javascript Handlebars - 调用部分时的连接字符串参数
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Handlebars - Concat string parameters when calling partial
提问by Vadorequest
I would like to know if it is possible to concat a variable with another string when loading a partial using Handlebars.
我想知道在使用 Handlebars 加载部分时是否可以将变量与另一个字符串连接起来。
{{partial logos this ns=../ns nsr=../nsr id=id+"something"}}
I'd like to concat id+"something"and storing it into id, which would be sent to the template.
我想连接id+"something"并将其存储到 中id，然后将其发送到模板。
I'm using a custom helper to load partials (partial) which merge thiswith the options.hashprovided by handlebars.
我正在使用自定义帮助程序来加载与把手提供的部分partial合并的部分 ( ) 。thisoptions.hash
采纳答案by Hasanavi
There is a way actually. I've tried with default partial loader ">", but I hope it should work with "partial" too.
其实是有办法的。我已经尝试过使用默认的部分加载器“>”，但我希望它也可以与“部分”一起使用。
You can write a helper like this
你可以写一个这样的助手
Handlebars.registerHelper( 'concat', function(path) {
return "/etc/path" + path;
});
and Call it like
并称之为
{{> responsive-image src=(concat '/img/item-tire.png') alt="logo" }}
I hope that helps.
我希望这有帮助。
回答by Sjeiti
Here's an easier way. A helper named 'concat':
这是一个更简单的方法。一个名为“concat”的助手：
module.exports = function(){
var arg = Array.prototype.slice.call(arguments,0);
arg.pop();
return arg.join('');
};
To be used as:
用作：
{{>myPartial id=(concat "foo" myVar myOtherVar)}}
回答by Mike Mellor
You could do a slightly more reusable solution like so:
你可以做一个稍微更可重用的解决方案，如下所示：
module.exports = function (json) {
var concat = '';
var flipArray = [];
for(var key in json.hash){
flipArray.push(json.hash[key]);
}
for(var i = (flipArray.length - 1); i >= 0; i--){
concat += flipArray[i];
}
return concat;
};
Then call it like so:
然后像这样调用它：
{{> icon name=(concat a="file-" b="pdf")}} // passes file-pdf to the partial under the hash value name
or
或者
{{concat a="icon-" b="pdf" c="-Asdfasd" d="zxcvzxcvzxcvxz"}} // outputs icon-pdf-Asdfasdzxcvzxcvzxcvxz
The reason for the looping backwards in the helper is because handlebars currently lists it's hash parameters from last to first from the order you declare them.
在 helper 中向后循环的原因是因为 handlebars 当前按照您声明它们的顺序从最后到第一个列出它的哈希参数。
回答by lingeshram
Try following. Link helper is my own helper for adding context path /us
尝试跟随。链接助手是我自己的用于添加上下文路径/us的助手
Handlebars.registerHelper('link', function(option,parameter) {
return '/us' + option.hash.target;
});
Handlebars.registerHelper('concat', function() {
var outStr = '';
for(var arg in arguments){
if(typeof arguments[arg]!='object'){
outStr += arguments[arg];
}
}
return outStr;
});
Then I have called like this. My urlhaving puppies
然后我就这样打电话了。我的网址有小狗
{{link target=(concat '/' url)}}
Then finally i got output like this /us/puppies
然后最后我得到了这样的输出/us/puppies
回答by raidendev
No, this is not possible. Use concatenation inside your helper.
不，这是不可能的。在您的助手中使用连接。
{{partial logos this ns=../ns nsr=../nsr idKey=id idValue="something"}}
回答by daleyjem
If you're doing a simple a + bconcatenation and you're already including handlebars-helpers, you can use the addhelper:
如果你在做一个简单的a + b连接并且你已经包含了handlebars-helpers，你可以使用addhelper：
{{> myPartial myVariable=(add someVariable "some string") }}
回答by Jakub Krol
In ES6 this is possible using this helper:
concat : (...strs) => strs.join('')
在 ES6 中，这可以使用这个助手：
concat : (...strs) => strs.join('')
You may also want to skip parameters given by Handlebars, which is:
concat : (...strs) => strs.filter( arg => typeof arg !== 'object' ).join('')
您可能还想跳过 Handlebars 给出的参数，即：
concat : (...strs) => strs.filter( arg => typeof arg !== 'object' ).join('')
