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imageOptimizer.js
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imageOptimizer.js
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/**
* Copyright 2020 The AMP HTML Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const config = require('@lib/config');
/**
* Adds the desired image width to a URL as query paramter.
* This URL gets resolved to a thumbor compatible URL
* in platform/lib/routers/thumbor.js
*
* @param {String} src - the original img's src URL
* @param {Integer} width - the target width
*/
function imageOptimizer(src, width) {
const imageUrl = new URL(src, config.hosts.platform.base);
imageUrl.searchParams.set('width', width);
return imageUrl.href;
}
module.exports = imageOptimizer;