What is the difference between feature detection and feature inference

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#1 by (6 votes)

6

I wanted to know what the main difference between the two feature and feature inference forms >

javascript

asked by anonymous 03.06.2014 / 05:04

1 answer

Method resolution Change the project from .NET 4.5 to 4.5.2, how to do it?

score 6 · Accepted Answer

Feature detection is to verify that the function is available to be used explicitly.

Feature inference is to check if a function is available and, based on that, assume that another function is also available.

Feature Detection:

if (window.XMLHttpRequest) {
    new XMLHttpRequest();
}

Feature inference:

if (document.getElementsByTagName){
element = document.getElementById(id);
}