How to capture URL parameters

Question

I have used Community builder to build 'tab' and mapped it to VF page checkorder but when I try to load https://domain-url/conveyance/s/checkorder?id=a2O21000000aU52 ,I am unable to capture id parameter value.

Now, the reason behind this is checkorder page becomes iframe and doesn't contain id parameter. So, my question here is: How Can I capture ID value from the URL before it becomes iframe?

Gourav Verma · Answer

If you want to use JQuery then you have to write your function to get the URL parameter into VF page like:

function getParameterByName(name, url) {
    name = name.replace(/[[]]/g, "\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
    results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/+/g, " "));
}

Or if you want to get the URL parameter into controller class then you can use below:

String recordId = ApexPages.currentPage().getParameters().get('id');

How to capture URL parameters

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