if(jQuery) {
// jquery is loaded
}
if($) {
// jquery is loaded
}
or
if (jQuery != null) {
// jquery is loaded
}
if ($ != null) {
// jquery is loaded
}
On Thu, Jan 14, 2010 at 11:30 PM, zendog74 <[email protected]> wrote:
> I am trying to only load jquery and jqueryui if they do not already
> exist. If they do exist, then I load a bunch of plug-ins used by the
> app. However, the below is not working and I have no idea why. Can
> anyone provide some insight?
>
> if (typeof jQuery == 'undefined') {
> console.log("loading local jquery files");
>
> var head = document.getElementsByTagName("head")[0];
> var script = document.createElement("script");
> script.type = "text/javascript";
> script.src = "/cml/js/jquery.min.js";
> script.onload = loadPlugins();
> head.appendChild(script);
> var script2 = document.createElement("script");
> script2.type = "text/javascript";
> script2.src = "/cml/js/jquery-ui.min.js";
> head.appendChild(script2);
> }
>
> function loadPlugins(){
> if(typeof jQuery != 'undefined'){
> console.log("jquery is defined");
>
> jQuery.noConflict();
>
> //load the plugins
> if(!jQuery().maxlength){
> jQuery("head").append('<scr' + 'ipt
> type="text/javascript" src="<
> %=response.encodeURL(cntxPath + "/js/jquery.maxlength-min.js")%>"></
> scr' + 'ipt>');
> console.log("loaded maxlength plugin");
> }
>
> if(!jQuery().address){
> jQuery("head").append('<scr' + 'ipt
> type="text/javascript" src="<
> %=response.encodeURL(cntxPath + "/js/jquery.address-1.1.min.js")%>"></
> scr' + 'ipt>');
> console.log("loaded address plugin");
> }
>
> if(!jQuery().delay){
> jQuery("head").append('<scr' + 'ipt
> type="text/javascript" src="<
> %=response.encodeURL(cntxPath + "/js/jquery.delay.js")%>"></scr' +
> 'ipt>');
> console.log("loaded delay plugin");
> }
>
> if(!jQuery().ajaxSubmit){
> jQuery("head").append('<scr' + 'ipt
> type="text/javascript" src="<
> %=response.encodeURL(cntxPath + "/js/jquery.form.js")%>"></scr' +
> 'ipt>');
> console.log("loaded form plugin");
> }
> ....
>
> Thanks everyone.
>
