48 lines
1.5 KiB
TypeScript
48 lines
1.5 KiB
TypeScript
/**
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* Check if an element has a class
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* @param {HTMLElement} elm
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* @param {string} cls
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* @returns {boolean}
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*/
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export function hasClass(ele: HTMLElement, cls: string) {
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return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
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}
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/**
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* Add class to element
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* @param {HTMLElement} elm
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* @param {string} cls
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*/
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export function addClass(ele: HTMLElement, cls: string) {
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if (!hasClass(ele, cls)) ele.className += ' ' + cls;
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}
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/**
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* Remove class from element
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* @param {HTMLElement} elm
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* @param {string} cls
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*/
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export function removeClass(ele: HTMLElement, cls: string) {
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if (hasClass(ele, cls)) {
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const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
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ele.className = ele.className.replace(reg, ' ');
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}
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}
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export function mix(color1: string, color2: string, weight: number) {
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weight = Math.max(Math.min(Number(weight), 1), 0);
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const r1 = parseInt(color1.substring(1, 3), 16);
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const g1 = parseInt(color1.substring(3, 5), 16);
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const b1 = parseInt(color1.substring(5, 7), 16);
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const r2 = parseInt(color2.substring(1, 3), 16);
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const g2 = parseInt(color2.substring(3, 5), 16);
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const b2 = parseInt(color2.substring(5, 7), 16);
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const r = Math.round(r1 * (1 - weight) + r2 * weight);
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const g = Math.round(g1 * (1 - weight) + g2 * weight);
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const b = Math.round(b1 * (1 - weight) + b2 * weight);
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const rStr = ('0' + (r || 0).toString(16)).slice(-2);
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const gStr = ('0' + (g || 0).toString(16)).slice(-2);
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const bStr = ('0' + (b || 0).toString(16)).slice(-2);
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return '#' + rStr + gStr + bStr;
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}
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