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chore[react-devtools]: extract some utils into separate modules to unify implementations (#30597)
Stacked on #30596. See [this commit](4ba5e78). Moving `formatWithStyles` and `formatConsoleArguments` to its own modules, so that we can finally have a single implementation for these and stop inlining them in RDT global hook object.
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4 files changed

+150
-216
lines changed

4 files changed

+150
-216
lines changed

‎packages/react-devtools-shared/src/backend/utils/formatConsoleArguments.js‎

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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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// Do not add / import anything to this file.
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// This function could be used from multiple places, including hook.
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// Skips CSS and object arguments, inlines other in the first argument as a template string
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export default function formatConsoleArguments(
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maybeMessage: any,
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...inputArgs: $ReadOnlyArray<any>
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): $ReadOnlyArray<any> {
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if (inputArgs.length === 0 || typeof maybeMessage !== 'string') {
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return [maybeMessage, ...inputArgs];
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}
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const args = inputArgs.slice();
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let template = '';
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let argumentsPointer = 0;
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for (let i = 0; i < maybeMessage.length; ++i) {
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const currentChar = maybeMessage[i];
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if (currentChar !== '%') {
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template += currentChar;
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continue;
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}
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const nextChar = maybeMessage[i + 1];
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++i;
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// Only keep CSS and objects, inline other arguments
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switch (nextChar) {
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case 'c':
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case 'O':
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case 'o': {
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++argumentsPointer;
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template += `%${nextChar}`;
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break;
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}
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case 'd':
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case 'i': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += parseInt(arg, 10).toString();
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break;
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}
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case 'f': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += parseFloat(arg).toString();
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break;
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}
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case 's': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += arg.toString();
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break;
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}
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default:
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template += `%${nextChar}`;
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}
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}
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return [template, ...args];
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}

‎packages/react-devtools-shared/src/backend/utils/formatWithStyles.js‎

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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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// Do not add / import anything to this file.
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// This function could be used from multiple places, including hook.
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// Formats an array of args with a style for console methods, using
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// the following algorithm:
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// 1. The first param is a string that contains %c
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// - Bail out and return the args without modifying the styles.
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// We don't want to affect styles that the developer deliberately set.
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// 2. The first param is a string that doesn't contain %c but contains
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// string formatting
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// - [`%c${args[0]}`, style, ...args.slice(1)]
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// - Note: we assume that the string formatting that the developer uses
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// is correct.
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// 3. The first param is a string that doesn't contain string formatting
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// OR is not a string
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// - Create a formatting string where:
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// boolean, string, symbol -> %s
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// number -> %f OR %i depending on if it's an int or float
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// default -> %o
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export default function formatWithStyles(
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inputArgs: $ReadOnlyArray<any>,
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style?: string,
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): $ReadOnlyArray<any> {
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if (
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inputArgs === undefined ||
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inputArgs === null ||
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inputArgs.length === 0 ||
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// Matches any of %c but not %%c
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(typeof inputArgs[0] === 'string' && inputArgs[0].match(/([^%]|^)(%c)/g)) ||
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style === undefined
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) {
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return inputArgs;
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}
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// Matches any of %(o|O|d|i|s|f), but not %%(o|O|d|i|s|f)
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const REGEXP = /([^%]|^)((%%)*)(%([oOdisf]))/g;
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if (typeof inputArgs[0] === 'string' && inputArgs[0].match(REGEXP)) {
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return [`%c${inputArgs[0]}`, style, ...inputArgs.slice(1)];
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} else {
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const firstArg = inputArgs.reduce((formatStr, elem, i) => {
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if (i > 0) {
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formatStr += ' ';
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}
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switch (typeof elem) {
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case 'string':
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case 'boolean':
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case 'symbol':
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return (formatStr += '%s');
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case 'number':
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const formatting = Number.isInteger(elem) ? '%i' : '%f';
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return (formatStr += formatting);
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default:
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return (formatStr += '%o');
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}
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}, '%c');
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return [firstArg, style, ...inputArgs];
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}
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}

‎packages/react-devtools-shared/src/backend/utils.js‎ renamed to ‎packages/react-devtools-shared/src/backend/utils/index.js‎

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*/
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import {compareVersions} from 'compare-versions';
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import {dehydrate} from '../hydration';
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import {dehydrate} from 'react-devtools-shared/src/hydration';
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import isArray from 'shared/isArray';
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import type {Source} from 'react-devtools-shared/src/shared/types';
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import type {DehydratedData} from 'react-devtools-shared/src/frontend/types';
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export {default as formatWithStyles} from './formatWithStyles';
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export {default as formatConsoleArguments} from './formatConsoleArguments';
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// TODO: update this to the first React version that has a corresponding DevTools backend
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const FIRST_DEVTOOLS_BACKEND_LOCKSTEP_VER = '999.9.9';
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export function hasAssignedBackend(version?: string): boolean {
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);
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}
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// NOTE: KEEP IN SYNC with src/hook.js
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// Formats an array of args with a style for console methods, using
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// the following algorithm:
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// 1. The first param is a string that contains %c
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// - Bail out and return the args without modifying the styles.
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// We don't want to affect styles that the developer deliberately set.
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// 2. The first param is a string that doesn't contain %c but contains
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// string formatting
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// - [`%c${args[0]}`, style, ...args.slice(1)]
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// - Note: we assume that the string formatting that the developer uses
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// is correct.
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// 3. The first param is a string that doesn't contain string formatting
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// OR is not a string
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// - Create a formatting string where:
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// boolean, string, symbol -> %s
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// number -> %f OR %i depending on if it's an int or float
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// default -> %o
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export function formatWithStyles(
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inputArgs: $ReadOnlyArray<any>,
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style?: string,
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): $ReadOnlyArray<any> {
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if (
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inputArgs === undefined ||
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inputArgs === null ||
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inputArgs.length === 0 ||
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// Matches any of %c but not %%c
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(typeof inputArgs[0] === 'string' && inputArgs[0].match(/([^%]|^)(%c)/g)) ||
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style === undefined
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) {
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return inputArgs;
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}
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// Matches any of %(o|O|d|i|s|f), but not %%(o|O|d|i|s|f)
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const REGEXP = /([^%]|^)((%%)*)(%([oOdisf]))/g;
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if (typeof inputArgs[0] === 'string' && inputArgs[0].match(REGEXP)) {
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return [`%c${inputArgs[0]}`, style, ...inputArgs.slice(1)];
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} else {
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const firstArg = inputArgs.reduce((formatStr, elem, i) => {
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if (i > 0) {
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formatStr += ' ';
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}
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switch (typeof elem) {
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case 'string':
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case 'boolean':
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case 'symbol':
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return (formatStr += '%s');
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case 'number':
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const formatting = Number.isInteger(elem) ? '%i' : '%f';
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return (formatStr += formatting);
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default:
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return (formatStr += '%o');
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}
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}, '%c');
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return [firstArg, style, ...inputArgs];
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}
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}
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// NOTE: KEEP IN SYNC with src/hook.js
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// Skips CSS and object arguments, inlines other in the first argument as a template string
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export function formatConsoleArguments(
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maybeMessage: any,
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...inputArgs: $ReadOnlyArray<any>
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): $ReadOnlyArray<any> {
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if (inputArgs.length === 0 || typeof maybeMessage !== 'string') {
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return [maybeMessage, ...inputArgs];
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}
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const args = inputArgs.slice();
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let template = '';
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let argumentsPointer = 0;
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for (let i = 0; i < maybeMessage.length; ++i) {
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const currentChar = maybeMessage[i];
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if (currentChar !== '%') {
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template += currentChar;
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continue;
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}
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const nextChar = maybeMessage[i + 1];
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++i;
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// Only keep CSS and objects, inline other arguments
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switch (nextChar) {
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case 'c':
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case 'O':
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case 'o': {
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++argumentsPointer;
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template += `%${nextChar}`;
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break;
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}
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case 'd':
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case 'i': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += parseInt(arg, 10).toString();
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break;
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}
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case 'f': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += parseFloat(arg).toString();
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break;
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}
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case 's': {
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const [arg] = args.splice(argumentsPointer, 1);
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template += arg.toString();
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break;
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}
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default:
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template += `%${nextChar}`;
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}
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}
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return [template, ...args];
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}
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// based on https://github.com/tmpfs/format-util/blob/0e62d430efb0a1c51448709abd3e2406c14d8401/format.js#L1
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// based on https://developer.mozilla.org/en-US/docs/Web/API/console#Using_string_substitutions
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// Implements s, d, i and f placeholders

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