javascript封装的一些函数

ゝ一世哀愁。 2022-01-14 09:27 296阅读 0赞

//运动函数
    function move(obj, attr, step, target) {
    	var left = parseInt(getStyle(obj, attr));
    	step = left >= target ? -step : step;
    	var timer3 = setInterval(function() {
    		left = left + step;
    		if((left >= target && step > 0) || (left <= target && step < 0)) {
    			left = target;
    			clearInterval(timer3);
    		}
    		obj.style[attr] = left + 'px';
    	}, 50)
    }

//非行间函数
    function getStyle(obj, attr) {
    	if(obj.currentStyle) {
    		return obj.currentStyle[attr];
    	} else {
    		return getComputedStyle(obj)[attr]
    	}
    }

//原生ajax封装
    function ajax(method, url, data, acy, fn) {
    	var _ajax = new XMLHttpRequest();
    	if(method.toLowerCase() == 'get') {
    		_ajax.open(method, url + '?' + data, acy)
    		_ajax.send();
    	} else if(method.toLowerCase() == 'post') {
    		_ajax.open(method, url, acy);
    		_ajax.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
    		_ajax.send(data);
    	}
    	_ajax.onreadystatechange = function() {
    		if(_ajax.readyState == 4 && _ajax.status == 200) {
    			var res = _ajax.response;
    			fn && fn(res);
    		}
    	}
    }

//cookie封装函数
    function setCookie(key, val, oDate) {
    	var nowDate = new Date();
    	if(oDate == 0) {
    		nowDate = 0;
    	} else {
    		nowDate.setSeconds(nowDate.getSeconds() + oDate);
    	}
    	document.cookie = key + '=' + val + ';expires=' + nowDate;
    }
    
    function getCookie(key) {
    	var oCookie = document.cookie;
    	var cookieArr = oCookie.split(';');
    	for(var i = 0; i < cookieArr.length; i++) {
    		var arr = cookieArr[i].split('=');
    		if(arr[0].trim() == key) {
    			return arr[1];
    		}
    	}
    	return false;
    }
    
    function removeCookie(key) {
    	setCookie(key, 1, -1);
    }

//淡入淡出和运动封装函数
    function bufferMove (obj,attr,target,num) {
    	var timer = setInterval(function () {
    		if(attr == 'opacity'){
    			var cur = parseFloat(getStyle(obj,attr))*100;
    		}else{
    			var cur = parseInt(getStyle(obj,attr));
    		}
    		var step = (target - cur)/num;
    		var speed = step>0? Math.ceil(cur + step) : Math.floor(cur + step);
    		if((speed <= target && step<0) || (speed>=target && step>0)){
    			speed = target;
    			clearInterval(timer);
    		}
    		if(attr == 'opacity'){
    			obj.style[attr] = speed/100;
    		}else{
    			obj.style[attr] = speed + 'px';
    		}
    	},50)
    }