Class Ext.XTemplate

A template class that supports advanced functionality like autofilling arrays, conditional processing with basic comparison operators, sub-templates, basic math function support, special built-in template variables, inline code execution and more. XTemplate also provides the templating mechanism built into Ext.DataView.

XTemplate supports many special tags and built-in operators that aren't defined as part of the API, but are supported in the templates that can be created. The following examples demonstrate all of the supported features. This is the data object used for reference in each code example:

var data = {
    name: 'Jack Slocum',
    title: 'Lead Developer',
    company: 'Ext JS, LLC',
    email: 'jack@extjs.com',
    address: '4 Red Bulls Drive',
    city: 'Cleveland',
    state: 'Ohio',
    zip: '44102',
    drinks: ['Red Bull', 'Coffee', 'Water'],
    kids: [{
        name: 'Sara Grace',
        age:3
    },{
        name: 'Zachary',
        age:2
    },{
        name: 'John James',
        age:0
    }]
};

Auto filling of arrays
The tpl tag and the for operator are used to process the provided data object. If for="." is specified, the data object provided is examined. If the variable in for is an array, it will auto-fill, repeating the template block inside the tpl tag for each item in the array:

var tpl = new Ext.XTemplate(
    '<p>Kids: ',
    '<tpl for=".">',
        '<p>{name}</p>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data.kids); // pass the kids property of the data object

Scope switching
The for property can be leveraged to access specified members of the provided data object to populate the template:

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Title: {title}</p>',
    '<p>Company: {company}</p>',
    '<p>Kids: ',
    '<tpl for="kids">', // interrogate the kids property within the data
        '<p>{name}</p>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data);

Access to parent object from within sub-template scope
When processing a sub-template, for example while looping through a child array, you can access the parent object's members via the parent object:

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Kids: ',
    '<tpl for="kids">',
        '<tpl if="age &gt; 1">',  // <-- Note that the > is encoded
            '<p>{name}</p>',
            '<p>Dad: {parent.name}</p>',
        '</tpl>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data);

Array item index and basic math support
While processing an array, the special variable {#} will provide the current array index + 1 (starts at 1, not 0). Templates also support the basic math operators + - * and / that can be applied directly on numeric data values:

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Kids: ',
    '<tpl for="kids">',
        '<tpl if="age &gt; 1">',  // <-- Note that the > is encoded
            '<p>{#}: {name}</p>',  // <-- Auto-number each item
            '<p>In 5 Years: {age+5}</p>',  // <-- Basic math
            '<p>Dad: {parent.name}</p>',
        '</tpl>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data);

Auto-rendering of flat arrays
Flat arrays that contain values (and not objects) can be auto-rendered using the special {.} variable inside a loop. This variable will represent the value of the array at the current index:

var tpl = new Ext.XTemplate(
    '<p>{name}\'s favorite beverages:</p>',
    '<tpl for="drinks">',
       '<div> - {.}</div>',
    '</tpl>'
);
tpl.overwrite(panel.body, data);

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Kids: ',
    '<tpl for="kids">',
        '<tpl if="age &gt; 1">',  // <-- Note that the > is encoded
            '<p>{name}</p>',
        '</tpl>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data);

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Company: {[values.company.toUpperCase() + ", " + values.title]}</p>',
    '<p>Kids: ',
    '<tpl for="kids">',
       '<div class="{[xindex % 2 === 0 ? "even" : "odd"]}">',
        '{name}',
        '</div>',
    '</tpl></p>'
);
tpl.overwrite(panel.body, data);

var tpl = new Ext.XTemplate(
    '<p>Name: {name}</p>',
    '<p>Kids: ',
    '<tpl for="kids">',
        '<tpl if="this.isGirl(name)">',
            '<p>Girl: {name} - {age}</p>',
        '</tpl>',
        '<tpl if="this.isGirl(name) == false">',
            '<p>Boy: {name} - {age}</p>',
        '</tpl>',
        '<tpl if="this.isBaby(age)">',
            '<p>{name} is a baby!</p>',
        '</tpl>',
    '</tpl></p>', {
     isGirl: function(name){
         return name == 'Sara Grace';
     },
     isBaby: function(age){
        return age < 1;
     }
});
tpl.overwrite(panel.body, data);