64 lines
1.3 KiB
TypeScript
64 lines
1.3 KiB
TypeScript
"use strict";
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// License: MIT
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export function addClass(elem: HTMLElement, ...cls: string[]) {
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if (cls.length === 0) {
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elem.classList.add("virtualtable");
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}
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if (cls.length === 1) {
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elem.classList.add("virtualtable", `virtualtable-${cls[0]}`);
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}
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else {
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elem.classList.add("virtualtable", ...cls.map(c => `virtualtable-${c}`));
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}
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}
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interface Timer {
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args: any[];
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id: number;
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}
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export function debounce(fn: Function, to: number, reset?: boolean) {
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let timer: Timer | null;
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return function(...args: any[]) {
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if (timer) {
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if (!reset) {
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timer.args = args;
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return;
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}
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window.clearTimeout(timer.id);
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}
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const id = window.setTimeout(function() {
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if (!timer) {
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return;
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}
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const {args} = timer;
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timer = null;
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try {
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fn(...args);
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}
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catch (ex) {
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console.error(ex.toString(), ex);
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}
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}, to);
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timer = {args, id};
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};
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}
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function sumreduce(p: number, c: number) {
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return p + c;
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}
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export function sum(arr: number[]) {
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return arr.reduce(sumreduce, 0);
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}
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export function clampUInt(v: number, max?: number) {
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v = (v | 0) || 0;
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return Math.max(0, Math.min(max || Number.MAX_SAFE_INTEGER, v));
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}
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export const IS_MAC = typeof navigator !== "undefined" &&
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navigator.platform &&
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navigator.platform.includes("Mac");
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