所以我创建了一个小的 JavaScript 函数库,我将使用它。有些用于 UI 功能,有些用于返回某些内容。下面我将发布两个代码,在进一步使用这个库之前,我想知道这个方法是否可行并且不是一个坏的举动,也请不要提及 jQuery,因为这都是 JavaScript!
HTMLElement.prototype.drag = function(bool) {
var self = this;
self.classList.add('draggable');
event.stopPropagation();
event.preventDefault();
var origLeft= parseInt(self.offsetLeft,10);
var origTop = parseInt(self.offsetTop,10);
var mdX = event.clientX;
var mdY = event.clientY;
var elements = [];
if(bool === true){
var j = window.localStorage.getItem('userSettings');
if(j){
self.style.left= j.left;
self.style.top = j.top;
}
}
function drag(bool) {
self.style.position="absolute";
self.style.zIndex=999;
self.style.left = origLeft + event.clientX - mdX + "px";
self.style.top = origTop + event.clientY - mdY + "px";
event.stopPropagation();
}
function stop(bool){
self.classList.remove('draggable');
self.style.zIndex=0;
document.removeEventListener('mousemove',drag,true);
document.removeEventListener('mouseup',stop,true);
if(bool === true){
var settings = {
left: self.style.left,
top: self.style.top
};
var b = JSON.stringify(settings);
window.localStorage.setItem('userSettings',b);
console.log(b);
}
event.stopPropagation();
}
document.addEventListener('mousemove',drag,true);
document.addEventListener('mouseup',stop,true);
};
上面的代码当然是一个draggable
函数,下面是一种getClientRects()
函数,但更好。
HTMLElement.prototype.getRect = function(){
var a = this.offsetLeft;
var b = this.offsetTop;
var c = this.offsetHeight + b;
var d = this.offsetWidth + a;
var f = this.offsetHeight;
var g = this.offsetWidth;
var obj = { };
obj.left = a;
obj.right=d;
obj.top=b;
obj.bottom=c;
obj.width = g;
obj.height=f;
return obj;
};
向您展示所有这些的目的是为了了解您的想法,也许是关于原型的建议,或者我不应该这样做。我只是喜欢这样的方法执行,document.getElementById('div').getRect();
而不是用函数来做getRect('div');