41 lines
1.4 KiB
JavaScript
41 lines
1.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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exports.getSourcemapBaseURL = getSourcemapBaseURL;
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function getSourcemapBaseURL(url, global) {
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let sourceMapBaseURL = null;
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if (url) {
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// Sources that have explicit URLs can be used directly as the base.
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sourceMapBaseURL = url;
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} else if (global?.location?.href) {
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// If there is no URL for the source, the map comment is relative to the
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// page being viewed, so we use the document href.
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sourceMapBaseURL = global.location.href;
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} else {
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// If there is no valid base, the sourcemap URL will need to be an absolute
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// URL of some kind.
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return null;
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}
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// A data URL is large and will never be a valid base, so we can just treat
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// it as if there is no base at all to avoid a sending it to the client
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// for no reason.
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if (sourceMapBaseURL.startsWith("data:")) {
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return null;
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}
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// If the base URL is a blob, we want to resolve relative to the origin
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// that created the blob URL, if there is one.
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if (sourceMapBaseURL.startsWith("blob:")) {
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const parsedBaseURL = URL.parse(sourceMapBaseURL);
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if (parsedBaseURL) {
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return parsedBaseURL.origin === "null" ? null : parsedBaseURL.origin;
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}
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return null;
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}
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return sourceMapBaseURL;
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}
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