50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
/**
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* @file Utils for leftychan javascript.
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* @author jonsmy
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*/
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const arrLast = arr => arr[arr.length-1] ?? undefined;
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const getConfigBool = (k,d) => { const v = localStorage.getItem(`jon-modjs::${k}`); return v ? v == "1" : d; }
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const writeCSSStyle = textContent => {
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const style = document.createElement("style")
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style.textContent = textContent
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document.head.appendChild(style)
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}
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const assert = {
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"equal": (actual, expected, message="No message set") => {
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if (actual !== expected) {
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const err = new Error(`Assertion Failed. ${message}`)
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err.data = { actual, expected}
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Error.captureStackTrace(err, assert.equal)
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debugger
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throw err
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}
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},
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"ok": (actual, message="No message set") => {
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if (!actual) {
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const err = new Error(`Assertion Failed. ${message}`)
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err.data = { actual }
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Error.captureStackTrace(err, assert.ok)
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debugger
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throw err
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}
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}
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}
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AbortSignal.any ??= function (signals) {
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const controller = new AbortController()
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const abortFn = () => {
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for (const signal of signals) {
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signal.removeEventListener("abort", abortFn)
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}
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controller.abort()
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}
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for (const signal of signals) {
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signal.addEventListener("abort", abortFn)
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}
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return controller.signal
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}
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