如何避免在手柄幫手中使用..查找

我不知道是否有可能避免在自定義幫助器中使用..語法。如何避免在手柄幫手中使用..查找

比方說，我有這樣的幫手：

Handlebars.registerHelper('for', function(from, to, incr, block) { 
    var accum = ''; 
    for(var i = from; i < to; i += incr) 
     accum += block.fn(i); 
    return accum; 
});

是有可能使用它，而不必把..對裏面引用：

{{#for 0 5 1}} 
     {{#ifCond1OrCond2 (lookup ../bid this) (lookup ../ask this)}} 
     <tr> 
      <td>{{math this "+" 1}}</td> 
      <td>{{#with (lookup ../../bid this)}}{{quantity}}{{/with}}</td> 
      <td>{{#with (lookup ../../bid this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup ../../ask this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup ../../ask this)}}{{quantity}}{{/with}}</td> 
     </tr> 
     {{/ifCond1OrCond2}} 
    {{/for}}

這裏是一個小提琴https://jsfiddle.net/ChristopheThiry/f9wu07f4/，顯示這是怎麼回事

這裏是我想用的語法：

{{#for 0 5 1}} 
     {{#ifCond1OrCond2 (lookup bid this) (lookup ask this)}} 
     <tr> 
      <td>{{math this "+" 1}}</td> 
      <td>{{#with (lookup bid this)}}{{quantity}}{{/with}}</td> 
      <td>{{#with (lookup bid this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup ask this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup ask this)}}{{quantity}}{{/with}}</td> 
     </tr> 
     {{/ifCond1OrCond2}} 
    {{/for}}

來源

2016-11-23 Christophe Thiry

我發現自己是一個文檔解決方案：使用@root可以完成從根元素開始的工作。

{{#for 0 5 1}} 
     {{#ifCond1OrCond2 (lookup @root/bid this) (lookup ask this)}} 
     <tr> 
      <td>{{math this "+" 1}}</td> 
      <td>{{#with (lookup @root/bid this)}}{{quantity}}{{/with}}</td> 
      <td>{{#with (lookup @root/bid this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup @root/ask this)}}{{price}}{{/with}}</td> 
      <td>{{#with (lookup @root/ask this)}}{{quantity}}{{/with}}</td> 
     </tr> 
     {{/ifCond1OrCond2}} 
    {{/for}}

來源

2016-12-01 08:12:02

如何避免在手柄幫手中使用..查找

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