54 lines
1.2 KiB
JavaScript
54 lines
1.2 KiB
JavaScript
'use strict';
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const getDocumentationUrl = require('./utils/get-documentation-url');
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const methodSelector = require('./utils/method-selector');
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const needsSemicolon = require('./utils/needs-semicolon');
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const selector = [
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methodSelector({
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object: 'Array',
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name: 'from',
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min: 1,
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max: 3
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}),
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// Allow `Array.from({length})`
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'[arguments.0.type!="ObjectExpression"]'
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].join('');
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const create = context => {
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const sourceCode = context.getSourceCode();
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const getSource = node => sourceCode.getText(node);
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return {
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[selector](node) {
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context.report({
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node,
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message: 'Prefer the spread operator over `Array.from()`.',
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fix: fixer => {
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const [arrayLikeArgument, mapFn, thisArgument] = node.arguments.map(node => getSource(node));
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let replacement = `${
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needsSemicolon(sourceCode.getTokenBefore(node), sourceCode) ? ';' : ''
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}[...${arrayLikeArgument}]`;
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if (mapFn) {
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const mapArguments = [mapFn, thisArgument].filter(Boolean);
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replacement += `.map(${mapArguments.join(', ')})`;
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}
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return fixer.replaceText(node, replacement);
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}
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});
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}
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};
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};
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module.exports = {
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create,
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meta: {
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type: 'suggestion',
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docs: {
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url: getDocumentationUrl(__filename)
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},
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fixable: 'code'
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}
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};
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