sending functions into angular as opposed to using 'function()'

Lately, I've been immersing myself in Angular development. One thing that caught my interest was the idea of using a declared function instead of a generic "function() {}" placeholder, particularly in scenarios like handling promise callbacks. I encountered several server requests where, upon encountering an error, I needed them to perform the same action. Instead of the typical approach:

.then(function(data) {

}, function(error) {

});

I wanted to try something different:

.then(function(data) {
}, handleError(error));

function handleError(error) { console.log(error); }

Unfortunately, this approach didn't seem to work for me. I'm not sure if there was a mistake in my implementation or if what I attempted is simply not feasible. Any insights on this?

Answer №1

When you include handleError(error), you are essentially executing the function (with an argument of some error variable, which may not even be defined). Instead, all you need to do is reference the function:

.then(function(data) {
     …
}, handleError);

Remember, no parentheses!

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