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authorruki <waruqi@gmail.com>2018-11-08 00:43:05 +0800
committerruki <waruqi@gmail.com>2018-11-07 22:18:30 +0800
commit89e95b3f143682ed9a006991bacf45c9dcba4818 (patch)
tree4f44cf41b828577d583890bdd5a1c31e8491a6ba /node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js
parentaa7f0199255277949790b41c56e8ec97dd4f0da4 (diff)
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Diffstat (limited to 'node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js')
-rw-r--r--node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js51
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diff --git a/node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js b/node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js
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--- a/node_modules/@vue/component-compiler-utils/dist/templateCompilerModules/srcset.js
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-"use strict";
-// vue compiler module for transforming `img:srcset` to a number of `require`s
-Object.defineProperty(exports, "__esModule", { value: true });
-const utils_1 = require("./utils");
-exports.default = () => ({
- postTransformNode: (node) => {
- transform(node);
- }
-});
-// http://w3c.github.io/html/semantics-embedded-content.html#ref-for-image-candidate-string-5
-const escapedSpaceCharacters = /( |\\t|\\n|\\f|\\r)+/g;
-function transform(node) {
- const tags = ['img', 'source'];
- if (tags.indexOf(node.tag) !== -1 && node.attrs) {
- node.attrs.forEach(attr => {
- if (attr.name === 'srcset') {
- // same logic as in transform-require.js
- const value = attr.value;
- const isStatic = value.charAt(0) === '"' && value.charAt(value.length - 1) === '"';
- if (!isStatic) {
- return;
- }
- const imageCandidates = value
- .substr(1, value.length - 2)
- .split(',')
- .map(s => {
- // The attribute value arrives here with all whitespace, except
- // normal spaces, represented by escape sequences
- const [url, descriptor] = s
- .replace(escapedSpaceCharacters, ' ')
- .trim()
- .split(' ', 2);
- return { require: utils_1.urlToRequire(url), descriptor };
- });
- // "require(url1)"
- // "require(url1) 1x"
- // "require(url1), require(url2)"
- // "require(url1), require(url2) 2x"
- // "require(url1) 1x, require(url2)"
- // "require(url1) 1x, require(url2) 2x"
- const code = imageCandidates
- .map(({ require, descriptor }) => `${require} + "${descriptor ? ' ' + descriptor : ''}, " + `)
- .join('')
- .slice(0, -6)
- .concat('"')
- .replace(/ \+ ""$/, '');
- attr.value = code;
- }
- });
- }
-}