I think the cleanest implementation of this would be to add {{"\n"~}}
where you want a hard-stop on new lines.
The "\n"
can technically be anything except for empty, ie ""
. I used "\n"
to make it clear what I am doing in the editor.
Example
Three empty lines after this
{{"\n"~}}
Three empty lines before this
Two empty lines before this. No empty lines after this.
{{~"\n"~}}
No empty lines before this.
Result
Three empty lines after this
Three empty lines before this
Two empty lines before this. No empty lines after this.No empty lines before this.
Basically, as others have said, any helper can be prefixed or suffixed with ~
. Here, I've decided to pass a value that won't render as the helper ("\n"
) which allows us to pass ~
freely to control before and after whitespace.
Edit
Alternatively:
Handlebars.registerHelper(
'singleLineOnly',
function (options) { // "this" cannot be provided to inline function!
return options.fn(this).replace(/[\r\n]+/gm, '')
}
)
Handlebars.registerHelper(
'singleSpaceOnly',
function (options) { // "this" cannot be provided to inline function!
return options.fn(this).replace(/\s\s+/g, ' ')
}
)
Which will allow you to take something like this:
{{#each this}}
{{#singleLineOnly}}
{{#singleSpaceOnly}}
{{calculatedAmount}}
{{!an example comment}}
{{#if unitOfMeasure.translate}}
{{{unitOfMeasure.translate.value}}}
{{/if}}
{{!some random comment}}
{{#unless unitOfMeasure.translate}}
{{{unitOfMeasure.value}}}
{{/unless}}
{{!Some random comment}}
{{#ifNotEquals (lowerCase product.value) "other"}}
{{!If translated, use translated UOM}}
{{#if product.translate}}
{{{product.translate.value}}}
{{/if}}
{{!If not translated, use default UOM}}
{{#unless product.translate}}
{{{product.value}}}
{{/unless}}
{{/ifNotEquals}}
{{!just some more logic for example}}
{{#ifNotEquals (lowerCase ingredient.value) "other"}}
{{!If translated, use translated UOM}}
{{#if ingredient.translate}}
{{{ingredient.translate.value}}}
{{/if}}
{{!If not translated, use default UOM}}
{{#unless ingredient.translate}}
{{{ingredient.value}}}
{{/unless}}
{{/ifNotEquals}}
<br/>
{{/singleSpaceOnly}}
{{/singleLineOnly}}
{{/each}}
And end up with this:
1/2 oz. first ingredient <br/>
1 pump(s) another ingredient <br/>
3/4 oz. this ingredient <br/>
2 shot(s) that ingredient <br/>
last instruction <br/>
{{#singleLineOnly}}
and {{#singleSpaceOnly}}
can be used as a wrapper for any text. You'll most likely want to use these with ~
for additional before/after whitespace control. For example: {{~#singleLineOnly~}}