I'm using Handlebars for templating in my project. Is there a way to get the index of the current iteration of an "each" helper in Handlebars?
<tbody>
{{#each item}}
<tr>
<td><!--HOW TO GET ARRAY INDEX HERE?--></td>
<td>{{this.key}}</td>
<td>{{this.value}}</td>
</tr>
{{/each}}
</tbody>
This question is related to
javascript
handlebars.js
I know this is too late. But i solved this issue with following Code:
Java Script:
Handlebars.registerHelper('eachData', function(context, options) {
var fn = options.fn, inverse = options.inverse, ctx;
var ret = "";
if(context && context.length > 0) {
for(var i=0, j=context.length; i<j; i++) {
ctx = Object.create(context[i]);
ctx.index = i;
ret = ret + fn(ctx);
}
} else {
ret = inverse(this);
}
return ret;
});
HTML:
{{#eachData items}}
{{index}} // You got here start with 0 index
{{/eachData}}
if you want start your index with 1 you should do following code:
Javascript:
Handlebars.registerHelper('eachData', function(context, options) {
var fn = options.fn, inverse = options.inverse, ctx;
var ret = "";
if(context && context.length > 0) {
for(var i=0, j=context.length; i<j; i++) {
ctx = Object.create(context[i]);
ctx.index = i;
ret = ret + fn(ctx);
}
} else {
ret = inverse(this);
}
return ret;
});
Handlebars.registerHelper("math", function(lvalue, operator, rvalue, options) {
lvalue = parseFloat(lvalue);
rvalue = parseFloat(rvalue);
return {
"+": lvalue + rvalue
}[operator];
});
HTML:
{{#eachData items}}
{{math index "+" 1}} // You got here start with 1 index
{{/eachData}}
Thanks.
Arrays:
{{#each array}}
{{@index}}: {{this}}
{{/each}}
If you have arrays of objects... you can iterate through the children:
{{#each array}}
//each this = { key: value, key: value, ...}
{{#each this}}
//each key=@key and value=this of child object
{{@key}}: {{this}}
//Or get index number of parent array looping
{{@../index}}
{{/each}}
{{/each}}
Objects:
{{#each object}}
{{@key}}: {{this}}
{{/each}}
If you have nested objects you can access the key
of parent object with
{{@../key}}
Using loop in hbs little bit complex
<tbody>
{{#each item}}
<tr>
<td><!--HOW TO GET ARRAY INDEX HERE?--></td>
<td>{{@index}}</td>
<td>{{this}}</td>
</tr>
{{/each}}
</tbody>
In handlebar version 4.0 onwards,
{{#list array}}
{{@index}}
{{/list}}
This has changed in the newer versions of Ember.
For arrays:
{{#each array}}
{{_view.contentIndex}}: {{this}}
{{/each}}
It looks like the #each block no longer works on objects. My suggestion is to roll your own helper function for it.
Thanks for this tip.
In handlebar version 3.0 onwards,
{{#each users as |user userId|}}
Id: {{userId}} Name: {{user.name}}
{{/each}}
In this particular example, user will have the same value as the current context and userId will have the index value for the iteration. Refer - http://handlebarsjs.com/block_helpers.html in block helpers section
Source: Stackoverflow.com