48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
import jsesc from "jsesc";
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import { isIdentifier } from "./utilities.js";
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/**
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* @param {import("@babel/types").Node} node
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* @returns {boolean}
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*/
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function isStringRaw(node) {
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return (
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node.type === "TaggedTemplateExpression" &&
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node.tag.type === "MemberExpression" &&
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!node.tag.computed &&
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!node.tag.optional &&
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isIdentifier(node.tag.object, "String") &&
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isIdentifier(node.tag.property, "raw")
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);
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}
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/**
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* `` String.raw`foo` `` -> `"foo"`
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* `` String.raw`foo ${"bar"}` `` -> `` `foo ${"bar"}` ``
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*
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* @param {import("@babel/types").TaggedTemplateExpression} node
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* @returns {import("@babel/types").TaggedTemplateExpression}
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*/
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function transformStringRaw(taggedTemplateExpression) {
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const templateLiteral = taggedTemplateExpression.quasi;
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if (templateLiteral.expressions.length === 0) {
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const { raw } = templateLiteral.quasis[0].value;
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const value = new Function(`return \`${jsesc(raw)}\``)();
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return { type: "StringLiteral", value };
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}
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const quasis = templateLiteral.quasis.map((quasis) => {
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const { raw } = quasis.value;
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return { ...quasis, value: { ...quasis, raw: jsesc(raw) } };
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});
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return { ...templateLiteral, quasis };
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}
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export default {
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shouldSkip: (text /* , file*/) => !text.includes("String.raw`"),
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test: isStringRaw,
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transform: transformStringRaw,
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};
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