Minor javascript cross-browser hack

Support - Assistance technique
#1

Hi,

Just a minor javascript cross-browser hack.

When adding an options to a select tag using javascript, I can see in DHIS you are doing like this :

optionComboSelector.add( option, null );

This will only work on gecko-based browsers. For IE ( tested with IE 8 & 7 ) it will throw error , the right one should be like this :

optionComboSelector.add( option ); // only one param

So the solution should be :

try {
optionComboSelector.add( option, null ); // for gecko-based browser…not tested with other webkit-based browsers …

}catch(e){
    optionComboSelector.add(option);  // just for IE
}

A common method in common.js should be useful.

Regards,

···

–
Viet Nguyen

#2

OK thanks for pointing this out. There might be a centralised method for this in commons.js or lists.js. Is this already taken care of in jQuery, if so could we use that instead?

···

On Fri, Jan 22, 2010 at 12:16 PM, Viet Nguyen phamquocviet@gmail.com wrote:

Hi,

Just a minor javascript cross-browser hack.

When adding an options to a select tag using javascript, I can see in DHIS you are doing like this :

optionComboSelector.add( option, null );

This will only work on gecko-based browsers. For IE ( tested with IE 8 & 7 ) it will throw error , the right one should be like this :

optionComboSelector.add( option ); // only one param

So the solution should be :

try {
optionComboSelector.add( option, null ); // for gecko-based browser…not tested with other webkit-based browsers …

}catch(e){
    optionComboSelector.add(option);  // just for IE
}

A common method in common.js should be useful.

Regards,

#3

Hi,

If you want to use jQuery, I think the best way is create an array of string then append them into the select tag

var options = [ ] ;

for( … ) {
options.push("$title"); // collect items

}

jQuery("#selector").append(options.join("")); // append a string into a tag.

Regards,

···

2010/1/22 Lars Helge Øverland larshelge@gmail.com

On Fri, Jan 22, 2010 at 12:16 PM, Viet Nguyen phamquocviet@gmail.com wrote:

Hi,

Just a minor javascript cross-browser hack.

When adding an options to a select tag using javascript, I can see in DHIS you are doing like this :

optionComboSelector.add( option, null );

This will only work on gecko-based browsers. For IE ( tested with IE 8 & 7 ) it will throw error , the right one should be like this :

optionComboSelector.add( option ); // only one param

So the solution should be :

try {
optionComboSelector.add( option, null ); // for gecko-based browser…not tested with other webkit-based browsers …

}catch(e){
    optionComboSelector.add(option);  // just for IE
}

A common method in common.js should be useful.

Regards,

OK thanks for pointing this out. There might be a centralised method for this in commons.js or lists.js. Is this already taken care of in jQuery, if so could we use that instead?

–
Viet Nguyen