75 lines
3.1 KiB
JavaScript
75 lines
3.1 KiB
JavaScript
/**
|
|
* @fileoverview Rule to disallow unnecessary computed property keys in object literals
|
|
* @author Burak Yigit Kaya
|
|
*/
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Requirements
|
|
//------------------------------------------------------------------------------
|
|
|
|
const astUtils = require("../ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
const MESSAGE_UNNECESSARY_COMPUTED = "Unnecessarily computed property [{{property}}] found.";
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "disallow unnecessary computed property keys in object literals",
|
|
category: "ECMAScript 6",
|
|
recommended: false
|
|
},
|
|
|
|
schema: [],
|
|
|
|
fixable: "code"
|
|
},
|
|
create(context) {
|
|
const sourceCode = context.getSourceCode();
|
|
|
|
return {
|
|
Property(node) {
|
|
if (!node.computed) {
|
|
return;
|
|
}
|
|
|
|
const key = node.key,
|
|
nodeType = typeof key.value;
|
|
|
|
if (key.type === "Literal" && (nodeType === "string" || nodeType === "number") && key.value !== "__proto__") {
|
|
context.report({
|
|
node,
|
|
message: MESSAGE_UNNECESSARY_COMPUTED,
|
|
data: { property: sourceCode.getText(key) },
|
|
fix(fixer) {
|
|
const leftSquareBracket = sourceCode.getFirstToken(node, astUtils.isOpeningBracketToken);
|
|
const rightSquareBracket = sourceCode.getFirstTokenBetween(node.key, node.value, astUtils.isClosingBracketToken);
|
|
const tokensBetween = sourceCode.getTokensBetween(leftSquareBracket, rightSquareBracket, 1);
|
|
|
|
if (tokensBetween.slice(0, -1).some((token, index) =>
|
|
sourceCode.getText().slice(token.range[1], tokensBetween[index + 1].range[0]).trim())) {
|
|
|
|
// If there are comments between the brackets and the property name, don't do a fix.
|
|
return null;
|
|
}
|
|
|
|
const tokenBeforeLeftBracket = sourceCode.getTokenBefore(leftSquareBracket);
|
|
|
|
// Insert a space before the key to avoid changing identifiers, e.g. ({ get[2]() {} }) to ({ get2() {} })
|
|
const needsSpaceBeforeKey = tokenBeforeLeftBracket.range[1] === leftSquareBracket.range[0] &&
|
|
!astUtils.canTokensBeAdjacent(tokenBeforeLeftBracket, sourceCode.getFirstToken(key));
|
|
|
|
const replacementKey = (needsSpaceBeforeKey ? " " : "") + key.raw;
|
|
|
|
return fixer.replaceTextRange([leftSquareBracket.range[0], rightSquareBracket.range[1]], replacementKey);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|