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JavaScript JavaScript and the DOM (Retiring) Getting a Handle on the DOM A Simple Example

Posted by gennady
gennady
14,145 Points

The code doesn't work in Safari 10.0.3

Hi! I got an error with the code in Safari: Code:

const myHeading = document.getElementById('myHeading');

myHeading.addEventListener('click', () => {
    console.log('test')
    myHeading.style.color = 'red';
});

Error:

SyntaxError: Can't create duplicate variable that shadows a global property: 'myHeading'

And event handling doesn't work. In Chrome I've the same code working perfictly fine. Should we use ES6 recomendations if it's doesn't work well even in the latest version of Safari?

Thank you!

4 Answers

miikis
miikis
44,957 Points

Hey gennady,

It's a bug in Safari. Change const to var and it should work.

Ruben Dario Avila Home
Ruben Dario Avila Home
8,806 Points
Ruben Dario Avila Home
Ruben Dario Avila Home
8,806 Points

It's a Bug in Webkit Safari Core, because the name of the const are the same of the ID. Rename Const and it works.

Jeremy Hamilton
Jeremy Hamilton
7,229 Points
Jeremy Hamilton
Jeremy Hamilton
7,229 Points

You can also just rename the constant and it'll work.

NiKole Maxwell
NiKole Maxwell
11,083 Points
NiKole Maxwell
NiKole Maxwell
11,083 Points

Interesting, I just ran into the same problem using Chrome (beta v. 59.0.3071.36) and IE/Edge. Thanks to everyone here for posting. I renamed variable(constant) to "blurb" from "myHeading" and it worked perfectly. 

const blurb = document.getElementById('myHeading');

blurb.addEventListener('click', () => {
    blurb.style.color = 'red';
});