chrome-devtools-frontend
Version:
Chrome DevTools UI
49 lines (41 loc) • 1.95 kB
JavaScript
// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file contains utility functions that are commonly needed in ESLint
// rules. It does not contain any ESLint rules itself.
/**
* @param taggedTemplateExpressionNode - a TaggedTemplateExpression node from the AST of the parsed code.
* @returns {boolean} - `true` if the code matches LitHtml.html`` or html``, and false otherwise.
*/
function isLitHtmlTemplateCall(taggedTemplateExpressionNode) {
if (taggedTemplateExpressionNode.type !== 'TaggedTemplateExpression') {
throw new Error('Node of type other than TaggedTemplateExpression passed to isLitHtmlTemplateCall.');
}
// Match LitHtml.html``
const {tag} = taggedTemplateExpressionNode;
if (!tag) {
return false;
}
// Match LitHtml.html``
const isLitHtmlDotHtmlCall = tag.object?.name === 'LitHtml' && tag.property?.name === 'html';
// Match html`` (and guess that it's Lit)
const isDestructuredHtmlCall = tag.type === 'Identifier' && tag.name === 'html';
return isLitHtmlDotHtmlCall || isDestructuredHtmlCall;
}
/**
* @param callExpressionNode - a CallExpression node from the AST of the parsed code.
* @returns {boolean} - `true` if the code matches LitHtml.render() or render(), and false otherwise.
*/
function isLitHtmlRenderCall(callExpressionNode) {
if (callExpressionNode.type !== 'CallExpression') {
throw new Error('Node of type other than CallExpresson passed to isLitHtmlRenderCall.');
}
const {callee} = callExpressionNode;
const isDestructuredRenderCall = callee.type === 'Identifier' && callee.name === 'render';
const isLitHtmlDotRenderCall = callee.object?.name === 'LitHtml' && callee.property?.name === 'render';
return isDestructuredRenderCall || isLitHtmlDotRenderCall;
}
module.exports = {
isLitHtmlTemplateCall,
isLitHtmlRenderCall
};