Js change select option text

By: beatgene On: 18.06.2017

HTML DOM Option text Property

It forms the basis of implementing inter-dependant select menus, where the selection of one menu changes the contents of another. In this tutorial, lets look at how this is done, and also, how to create a 2 level interdependent select list using the technique.

js change select option text

The basic technique for changing a select element's content using JavaScript is a two part process. I'll use the following SELECT element as an example:. Doing the above instantly empties the select element, ready to be populated with new data.

The select menu is now repopulated with 3 new entries "Sports", "Music", and "Movies". In case you're wondering, the Option constructor supports the following four parameters, the later two optional:. For more info, see Option constructor in our JavaScript Reference. When repopulating a select element's content, you may want to use a loop instead of changing each option one by one.

Furthermore, the total number of options may not be known in advance such as 3 aboveso you need a dynamic way to add new options to select.

In this case, use the below:. The key here is the property "options.

This lets you add new options to the end of the select element without knowing any info about its existing length. Moving on, you can also selectively remove a single option without performing mass destruction on all options within select first. This is done by setting the desired option to null. Doing so removes the option from the list, with the options below it moving up to occupy the void:.

JavaScript: set dropdown selected item based on option text - Stack Overflow

You can also easily remove multiple options from futures & forex day trading, provided they are at the end of the list. Simply set the Options Array's length to something smaller than its current length, and say bye bye to options that fall after the new length in index:.

select - jQuery change text of an option when another option is selected - Stack Overflow

Ok, so far so good right? Now lets use our new found knowledge to create a classic two level inter-dependant select list. The value is memorized on the first function call and ignored otherwise because Disqus allows only one instance per page at the time.

Check Disqus' manual for more information. NO PART may be reproduced without author's permission. Home JavaScript Tutorials Changing Select element content on js change select option text fly.

Changing Select element content on the fly Changing a select element's content on the fly is a powerful feature of JavaScript that's just as practical. The basic technique The basic technique for changing a select element's content using JavaScript is a two part process.

I'll use the following SELECT element as an example: In case you're wondering, the Option constructor supports the following four parameters, the later two optional: Looping through and changing select element content When repopulating a select element's content, you may want to use a loop instead of changing each option one by one.

HTML DOM Option text Property

In this case, use the below: Removing a single option within select Moving on, you can also selectively remove a single option without performing mass destruction on all options within select first. Doing so removes the option from the list, with the options below it moving up to occupy the void: Simply set the Options Array's length to something smaller than its current length, and say bye bye to options that fall after the new length in index: Changing Select element content on the fly current page Creating a 2 level interdependent select list Creating a 2 level interdependent select list.

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