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While developing AJAX program, I met the design decision to make string I18N in JavaScript.code. Some string is only used by JavaScript. For example.

$('#submit').click(function() {
    $(#target).html('Please wait while submitting...').load(someURI);
}

I'd like to I18N the string 'Please wait while submitting...'. I'm not sure what's the best way to do it. Currently, I just have the string I18N-ed in server and rendered into a javascript variable in page (I'm using PHP/wordpress).

<script>strSubmit = <?php  _e('Please wait while submitting...'); ?></script>

Then, in javascript, I just use the varialble

$('#submit').click(function() {
    $(#target).html(strSubmit).load(someURI);
}

This works, but it looks messy. Is there any better way to achieve this?

While developing AJAX program, I met the design decision to make string I18N in JavaScript.code. Some string is only used by JavaScript. For example.

$('#submit').click(function() {
    $(#target).html('Please wait while submitting...').load(someURI);
}

I'd like to I18N the string 'Please wait while submitting...'. I'm not sure what's the best way to do it. Currently, I just have the string I18N-ed in server and rendered into a javascript variable in page (I'm using PHP/wordpress).

<script>strSubmit = <?php  _e('Please wait while submitting...'); ?></script>

Then, in javascript, I just use the varialble

$('#submit').click(function() {
    $(#target).html(strSubmit).load(someURI);
}

This works, but it looks messy. Is there any better way to achieve this?

  • php
  • javascript
  • internationalization
Share Improve this question asked Oct 12, 2009 at 9:22 Morgan ChengMorgan Cheng 76k66 gold badges177 silver badges232 bronze badges 1
  • You can read more here about the way Wordpress is planning to support I18n in javascript : make.wordpress/core/2016/10/10/… – Spone Commented Feb 15, 2017 at 20:28
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4 Answers 4

Reset to default 10

You should use JSON to convert the server side l10n strings to a JSON object :

// In the <head> tag :
<script type="text/javascript" src="locales.php"></script>

and this in locales.php :

var l10n = <?php echo json_encode($l10n); ?>;

where $l10n is an array which contains all the locales, like this :

$l10n = array(
  'Please wait while submitting...' => 'Veuillez patienter durant le traitement...',
  'bah' => 'bih'
);

You can now use these strings like this in JS : 

function $T(s){
  return l10n[s] || s;
}

alert($T('Please wait while submitting...'));

you can also automate this by using a php "preprocessor" for javascript

<script src="script.php?file=blah.js">

where script.php is something like

    function _repl($x) { return '"' . _e($x[1]) . '"'; }

    $js = file_get_contents($_GET['file']);
    $js = preg_replace_callback('~_e\("(.+?)"\)~', '_repl', $js);
    echo $js;

this will transparently replace _e(something) in javascript code with actual strings

You could generate the text into the original script itself.

$('#submit').click(function() {
    $(#target).html('<?php  _e('Please wait while submitting...'); ?>').load(someURI);
}

you could create sort of REST application, where you would fill the elements of javascript strings on document load from a service:

$(function(){
   var handleResponse = function.....; // fill your string elements from response
   var lang = "fr"; // language of localized document

   $.ajax(
       type: "GET",
       url: "/i18n.php?lang=" + lang + "&names=someName+someName1+someName2",
       success: handleResponse
   ); 
});

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