104 lines
2.4 KiB
JavaScript
104 lines
2.4 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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function cont(value_to_test, fn) {
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if (value_to_test != null) {
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return fn(value_to_test);
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} else {
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return null;
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}
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}
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function text(s) {
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return document.createTextNode(s);
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}
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function prepend(elem, children) {
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var child = elem.firstChild;
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if (child) {
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elem.insertBefore(children, child);
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} else {
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elem.appendChild(children);
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}
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}
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function _log() {
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for (var arg of arguments) {
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if (arg == null) {
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continue;
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}
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var pre = document.createElement('pre');
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pre.appendChild(text(arg.toString()));
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document.body.appendChild(pre);
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try {
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prepend(document.body, pre);
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} catch (e) {
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var pre = document.createElement('pre');
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pre.appendChild(text(e.toString()));
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document.body.appendChild(pre);
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}
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}
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}
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var console = {
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log: _log,
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error: _log
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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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if (AbortSignal.any == null) {
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AbortSignal.any = (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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}
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// polyfill for replaceChildren
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if( Node.prototype.replaceChildren === undefined) {
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Node.prototype.replaceChildren = function(addNodes) {
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while(this.lastChild) {
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this.removeChild(this.lastChild);
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}
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if (addNodes !== undefined) {
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this.append(addNodes);
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}
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}
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}
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