Hector Landete - 5 months ago 50

jQuery Question

I'm having some problems with javascript on desktop safari, on mobile is working fine.

When I try to run:

`return Math.trunc(num * Math.pow(10, 2)) / Math.pow(10, 2);`

I'm getting on console:

TypeError: 'undefined' is not a function (evaluating 'Math.trunc(num * Math.pow(10, 2))')

Any idea why can it be? On the rest of browsers is working perfectly and I have no clue why (I've never worked with safari).

Thanks!

Answer

`Math.trunc`

was added in ES2015 (June 2015). Apparently the JavaScript engine in the version of Safari you're using doesn't have it yet.

You could polyfill it if it's missing:

```
if (!Math.trunc) {
Object.defineProperty(Math, "trunc", {
value: function(val) {
return val < 0 ? Math.ceil(val) : Math.floor(val);
}
});
}
```