thyros
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Change Max-Height Property On A Div .Class Upon Click
How to remove the max-height setting from a single div element via class attribute upon click?
I have several rows of text, each row is enclosed within a div. For example;
<div class="promotext">Blah Blah Blah</div>
<div class="promotext">Blah Blah Blah</div>
<div class="promotext">Blah Blah Blah</div>
In the css stylesheet I have the setting
.promotext {max-height:3.7em; overflow:hidden;}
This ensures that if 'Blah blah blah' gets too long, after 3 lines, the text overflow is hidden. However, I want to enable the functionality that if a user clicks on the 'Blah blah' text, the max-height property is removed or nullified so that the full text becomes visible - however, only the div that was clicked should expand.
So setting a new style on .promotext wont cut it because all the text rows will expand, because we only want the clicked upon div to expand. The text rows are generated dynamically, sometimes there is 1-3 rows, sometimes there is upto 50 text rows. I cannot assign a unique ID to each text row as it is a template which repeats itself.
Any help in creating an expanding div solution would be much appreciated. Thanks.
I have several rows of text, each row is enclosed within a div. For example;
<div class="promotext">Blah Blah Blah</div>
<div class="promotext">Blah Blah Blah</div>
<div class="promotext">Blah Blah Blah</div>
In the css stylesheet I have the setting
.promotext {max-height:3.7em; overflow:hidden;}
This ensures that if 'Blah blah blah' gets too long, after 3 lines, the text overflow is hidden. However, I want to enable the functionality that if a user clicks on the 'Blah blah' text, the max-height property is removed or nullified so that the full text becomes visible - however, only the div that was clicked should expand.
So setting a new style on .promotext wont cut it because all the text rows will expand, because we only want the clicked upon div to expand. The text rows are generated dynamically, sometimes there is 1-3 rows, sometimes there is upto 50 text rows. I cannot assign a unique ID to each text row as it is a template which repeats itself.
Any help in creating an expanding div solution would be much appreciated. Thanks.
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ASKER
@Scrathcyboy
As I mentioned in the original post, the html is being repeated by a dynamic templating system which I have limited control over.. so it is not possible for me to add a unique ID to each div.
@Kravimir
This seems to work. Thanks. I want to test it a little further just to make sure there is no unexpected issues before closing the question. Also, could you please advise what changes need to be made if I wanted to add the following logic:
If .promotext element contains more than 150 characters (including spaces) then apply css property {cursor:pointer;} to the element.
Thanks again.
As I mentioned in the original post, the html is being repeated by a dynamic templating system which I have limited control over.. so it is not possible for me to add a unique ID to each div.
@Kravimir
This seems to work. Thanks. I want to test it a little further just to make sure there is no unexpected issues before closing the question. Also, could you please advise what changes need to be made if I wanted to add the following logic:
If .promotext element contains more than 150 characters (including spaces) then apply css property {cursor:pointer;} to the element.
Thanks again.
You're welcome.
The problem with doing that is if the font-size is changed, even though the max-height is set in EMs, unless the width is also set in EMs, the number of lines of text might change, thus making the 150 characters an inexact number, so the cursor wouldn't always be changed. I'd recommend that you just add the cursor declaration to the existing style rule.
I should probably mention that the code I posted is an example and that it can be improved. One way would be by using an event handing system instead of the limited DOM0 event handlers.
Have you considered what happens when someone who does not have JavaScript enabled in his/her browser visits your page?
The problem with doing that is if the font-size is changed, even though the max-height is set in EMs, unless the width is also set in EMs, the number of lines of text might change, thus making the 150 characters an inexact number, so the cursor wouldn't always be changed. I'd recommend that you just add the cursor declaration to the existing style rule.
I should probably mention that the code I posted is an example and that it can be improved. One way would be by using an event handing system instead of the limited DOM0 event handlers.
Have you considered what happens when someone who does not have JavaScript enabled in his/her browser visits your page?
ASKER
Thanks.
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