自定义的js常用基础库：包括添加事件、删除事件、event事件对象兼容、Target兼容、阻止默认事件、阻止冒泡、添加类名、移除类名、是否包含类名、获取类名元素集、获取下一个元素节点、类似数组转数组、forEach方法。
const query = {
// 添加事件
add: function () {
var isEvent = 'addEventListener' in document;
return isEvent ? function (ele:any, type:string, handler:(event:any) => void) {
ele.addEventListener(type, handler, false);
} : function (ele:any, type:string, handler:(event:any) => void) {
ele.attachEvent('on' + type, handler);
};
}(),
// 移除事件
remove: function (ele, type, handler) {
var isEvent = 'addEventListener' in document;
return isEvent ? function (ele, type, handler) {
ele.removeEventListener(type, handler, false);
} : function (ele, type, handler) {
ele.detachEvent('on' + type, handler);
};
}(),
getEvent: function (event) {
return event || window.event;
},
getTarget: function (event) {
var e = query.getEvent(event);
return e.target || e.srcElement;
},
preventDefault: function (event) {
var e = query.getEvent(event);
if (e.preventDefault) {
e.preventDefault();
} else {
e.returnValue = false;
}
},
stopPropagation: function (event) {
var e = query.getEvent(event);
if (e.stopPropagation) {
e.stopPropagation();
} else {
e.cancelBubble = true;
}
},
addClass: function (node, classname) {
if (node.classList) {
node.classList.add(classname);
} else {
if (node.className.indexOf(classname) == -1) node.className += ' ' + classname;
}
},
removeClass: function (node, classname) {
if (node.classList) {
node.classList.remove(classname);
} else {
var reg = eval("/\\s*" + classname + "/ig");
node.className = node.className.replace(reg, '');
}
},
hasClass : function(ele,className){
if(ele.classList){
return ele.classList.contains(className);
}
return new RegExp('\\b'+className+'\\b','i').test( ele.className );
},
getByClass: function (Classname, ele?) {
var ele = ele || document;
return ele.querySelectorAll ? ele.querySelectorAll('.' + Classname) : (function (ele) {
var ele = ele.getElementsByTagName('*'),
Result = [],
re = new RegExp('\\b' + Classname + '\\b', 'i'),
i = 0;
for (; i < ele.length; i++) {
if (re.test(ele[i].className)) {
Result.push(ele[i]);
}
}
return Result;
}(ele));
},
getNextNode(ele){
if(ele.nextElementSibling) return ele.nextElementSibling;
var e = ele.nextSibling;
while(e && 1 !== e.nodeType)
e = e.nextSibling;
return e;
},
toArray: function (arr) {
var reduced = [];
try {
reduced = Array.prototype.slice.call(arr, 0);
} catch (ex) {
for (var i = 0, len = arr.length; i < len; i++) {
reduced[i] = arr[i];
}
}
return reduced;
},
forEach: function (ary, callback) {
if (typeof ary.forEach == "function") {
ary.forEach(function (value, index, a) {
callback.call(ary, value, index, a);
});
} else {// 对于古董浏览器，如IE6-IE8
for (var k = 0, length = ary.length; k < length; k++) {
callback.call(ary, ary[k], k, ary);
}
}
}
};
export default query;还有优化的地方，代码仅供参考。
