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import Vue from 'vue';
const isServer = Vue.prototype.$isServer;
/* istanbul ignore next */
export const on = (function() {
if (!isServer && document.addEventListener) {
return function(element: any, event: any, handler: any) {
if (element && event && handler) {
element.addEventListener(event, handler, false);
}
};
} else {
return function(element: any, event: any, handler: any) {
if (element && event && handler) {
element.attachEvent('on' + event, handler);
}
};
}
})();
/* istanbul ignore next */
export const off = (function() {
if (!isServer && document.removeEventListener) {
return function(element: any, event: any, handler: any) {
if (element && event) {
element.removeEventListener(event, handler, false);
}
};
} else {
return function(element: any, event: any, handler: any) {
if (element && event) {
element.detachEvent('on' + event, handler);
}
};
}
})();
/* istanbul ignore next */
export function hasClass(el: Element | HTMLElement, cls: string) {
if (!el || !cls) return false;
if (cls.indexOf(' ') !== -1) throw new Error('className should not contain space.');
if (el.classList) {
return el.classList.contains(cls);
} else {
return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
}
}
/* istanbul ignore next */
export function addClass(el: Element | HTMLElement, cls: string) {
if (!el) return;
let curClass = el.className;
const classes = (cls || '').split(' ');
for (let i = 0, j = classes.length; i < j; i++) {
const clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.add(clsName);
} else {
if (!hasClass(el, clsName)) {
curClass += ' ' + clsName;
}
}
}
if (!el.classList) {
el.className = curClass;
}
}
/* istanbul ignore next */
export function removeClass(el: Element | HTMLElement, cls: string) {
if (!el || !cls) return;
const classes = cls.split(' ');
let curClass = ' ' + el.className + ' ';
for (let i = 0, j = classes.length; i < j; i++) {
const clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.remove(clsName);
} else {
if (hasClass(el, clsName)) {
curClass = curClass.replace(' ' + clsName + ' ', ' ');
}
}
}
if (!el.classList) {
el.className = trim(curClass);
}
}
/* istanbul ignore next */
const trim = function(str: string) {
return (str || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
};