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b3acaf8075
We are using browserslist-useragent-regexp to build a regex to compare our user agents against. This regex is generated and stored in web/generated and is generated on every provision. This will remain mostly unchanged since .browserlistrc is not a frequently modified file. Still, we run it on every provision since we don't have a good mechanism to detect changes in that list. We can look into that in a followup PR. In terms of chosing the library, the regexp library is the current recommendation browserslist github. Another library called browserslist-useragent exists but it is not actively being worked upon and is slower as well: https://gist.github.com/dangreen/55c41072d8891efd3a772a4739d6cd9d In terms of which browsers to flag as unsupported, we don't flag any browsers that are not part of >=0 % query of browserslist. If they are part of >= 0 %, but not part of `baseline widely available with downstream`, we flag the browser as unsupported. We also allow higher versions while generating the regex, so if our regex is outdated a little bit, users with newer browsers don't get the unsupported browser warning.
36 lines
3.4 KiB
JavaScript
36 lines
3.4 KiB
JavaScript
"use strict";
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const assert = require("node:assert/strict");
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const {mock_esm, zrequire} = require("./lib/namespace.cjs");
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const {run_test} = require("./lib/test.cjs");
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mock_esm("../generated/supported_browser_regex.ts", {
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// Snapshot of generated regex on 2025-12-17
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baselineBrowserRegex:
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/Edge?\/(1{2}[1-9]|1[2-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|Firefox\/(1{2}[4-9]|1[2-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|Chrom(ium|e)\/(1{2}[1-9]|1[2-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|(Maci|X1{2}).+ Version\/(16\.([4-9]|\d{2,})|(1[7-9]|[2-9]\d|\d{3,})\.\d+)([,.]\d+|)( \(\w+\)|)( Mobile\/\w+|) Safari\/|Chrome.+OPR\/(9[7-9]|\d{3,})\.\d+\.\d+|(CPU[ +]OS|iPhone[ +]OS|CPU[ +]iPhone|CPU IPhone OS|CPU iPad OS)[ +]+(16[._]([4-9]|\d{2,})|(1[7-9]|[2-9]\d|\d{3,})[._]\d+)([._]\d+|)|Android:?[ /-](14[2-9]|1[5-9]\d|[2-9]\d{2}|\d{4,})(\.\d+|)(\.\d+|)|Mobile Safari.+OPR\/([89]\d|\d{3,})\.\d+\.\d+|Android.+Firefox\/(14[4-9]|1[5-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|Android.+Chrom(ium|e)\/(14[2-9]|1[5-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|SamsungBrowser\/(2[2-9]|[3-9]\d|\d{3,})\.\d+/,
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allBrowsersRegex:
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/IE (5\.5|[67]\.0)|Trident\/4\.0|Trident\/5\.0|Trident\/6\.0|Trident\/[78]\.0|Edge?\/(1[2-9]|[2-9]\d|\d{3,})\.\d+(\.\d+|)|Firefox\/([2-9]|\d{2,})\.\d+(\.\d+|)|Chrom(ium|e)\/([4-9]|\d{2,})\.\d+(\.\d+|)([\d.]+$|.*Safari\/(?![\d.]+ Edge\/[\d.]+$))|(Maci|X1{2}).+ Version\/(3\.([1-9]|\d{2,})|([4-9]|\d{2,})\.\d+)([,.]\d+|)( \(\w+\)|)( Mobile\/\w+|) Safari\/|Opera\/9\.80.+Version\/(9\.0|9\.[56]|10\.[01]|10\.[56]|1{2}\.[01]|1{2}\.[56]|12\.[01])(\.\d+|)|Chrome.+OPR\/(1[5-9]|[2-9]\d|\d{3,})\.\d+\.\d+|[^e] (CPU[ +]OS|iPhone[ +]OS|CPU[ +]iPhone|CPU IPhone OS|CPU iPad OS)[ +]+(3[._]([2-9]|\d{2,})|([4-9]|\d{2,})[._]\d+)([._]\d+|)|Opera Mini|Android Eclair|Android Froyo|Android Gingerbread|Android Honeycomb|Android:?[ /-](2(\.([1-9]|\d{2,})|)|([3-9]|\d{2,})(\.\d+|))(\.\d+|);(?! ARM; Trident)|(Black[Bb]er{2}y|B{2}10).+Version\/([7-9]|\d{2,})\.\d+\.\d+|Opera\/.+Opera Mobi.+Version\/(1[01]\.0|1{2}\.1|1{2}\.5|12\.[01])|Mobile Safari.+OPR\/([89]\d|\d{3,})\.\d+\.\d+|Android.+Firefox\/(14[4-9]|1[5-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|Android.+Chrom(ium|e)\/(14[2-9]|1[5-9]\d|[2-9]\d{2}|\d{4,})\.\d+(\.\d+|)|IEMobile[ /]([1-9]\d|\d{3,})\.\d+|Android.+(UC? ?Browser|UCWEB|U3)[ /]?(15\.([5-9]|\d{2,})|(1[6-9]|[2-9]\d|\d{3,})\.\d+)\.\d+|SamsungBrowser\/([4-9]|\d{2,})\.\d+|Android.+MQ{2}Browser\/(14(\.(9|\d{2,})|)|(1[5-9]|[2-9]\d|\d{3,})(\.\d+|))(\.\d+|)|baidubrowser[\s/](13(\.(5[2-9]|[6-9]\d|\d{3,})|)|(1[4-9]|[2-9]\d|\d{3,})(\.\d+|))(\.\d+|)|K[Aa][Ii]OS\/(2\.([5-9]|\d{2,})|([3-9]|\d{2,})\.\d+)(\.\d+|)/,
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});
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const {is_browser_unsupported_old_version} = zrequire("browser_support");
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run_test("browser present in baseline browsers is supported", () => {
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window.navigator.userAgent = "Chrome/129.0.1132.57";
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assert.equal(is_browser_unsupported_old_version(), false);
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});
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run_test("browser present in all browsers but not in baseline browsers is unsupported", () => {
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window.navigator.userAgent = "Chrome/20.0.1132.57";
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assert.equal(is_browser_unsupported_old_version(), true);
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});
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run_test("browser not present in all browsers is skipped for checking", () => {
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window.navigator.userAgent = "ExerimentalBrowser/20.0.1132.57";
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assert.equal(is_browser_unsupported_old_version(), false);
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});
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run_test("future versions of a browser are supported", () => {
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window.navigator.userAgent = "Chrome/1000.0.1132.57";
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assert.equal(is_browser_unsupported_old_version(), false);
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});
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