原生js怎么綁定class
原生js怎么綁定class
吃雞游戲
2018-09-07 09:12:45
TA貢獻1951條經驗 獲得超3個贊
window.onload = function(){ if(!document.getElementsByClassName){ document.getElementsByClassName = function (cls){ var ret = []; var els = document.getElementsByTagName('*'); for(var i = 0 ; i < els.length; i++){ if(els[i].className === cls || els[i].className.indexOf(cls + ' ') > -1 || els[i].className.indexOf(' ' + cls + ' ') > -1 || els[i].className.indexOf(' ' + cls) > -1){ ret.push(els[i]); } } return ret; } } var checkInput = document.getElementsByClassName("check"); alert(checkInput.length); }
舉報