動(dòng)態(tài)加載js和css(外部文件)_javascript技巧

代碼如下:
// 動(dòng)態(tài)加載外部js文件
var flag = true;
if( flag ){
loadScript( "js/index.js" );
};
function loadScript( url ){
var script = document.createElement( "script" );
script.type = "type/javascipt";
script.src = url;
document.getElementsByTagName( "head" )[0].appendChild( script );
};
// 動(dòng)態(tài)加載js
if( flag ){
var script = document.createElement( "script" );
script.type = "text/javascript";
script.text = " ";
document.getElementsByTagName( "head" )[0].appendChild( script );
};
// 動(dòng)態(tài)加載外部css樣式
if( flag ){
loadCss( "css/base.css" );
};
function loadCss( url ){
var link = document.createElement( "link" );
link.type = "text/css";
link.rel = "stylesheet";
link.href = url;
document.getElementsByTagName( "head" )[0].appendChild( link );
};
// 動(dòng)態(tài)加載css樣式
if( flag ){
var style = document.createElement( "style" );
style.type = "text/css";
document.getElementsByTagName( "head" )[0].appendChild( style );
var sheet = document.styleSheets[0];
insertRules( sheet,"#gaga1","background:#f00",0 );
};
function insertRules( sheet,selectorTxt,cssTxt,position ){
if( sheet.insertRule ){ // 判斷非IE瀏覽器
sheet.insertRule( selectorTxt + "{" + cssTxt +"}" ,position );
}else if( sheet.addRule ){ //判斷是否是IE瀏覽器
sheet.addRule( selectorTxt ,cssTxt ,position )
}
}

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