Javascript 如果余烬车把出现状况

我有一个余烬助手方法，如下所示

export default () => { 
        Handlebars.registerHelper('ifCond', function (v1, operator, v2, options) {
            if (params[3]) {  //handle case insensitive conditions if 4 param is passed.
                params[0] = params[0].toLowerCase();
                params[2] = params[2].toLowerCase();
            }

        let v1 = params[0];
        let operator = params[1];
        let v2 = params[2];

        switch (operator) {
            case '==':
                return (v1 == v2);
            case '!=':
                return (v1 != v2);
            case '===':
                return (v1 === v2);
            case '<':
                return (v1 < v2);
            case '<=':
                return (v1 <= v2);
            case '>':
                return (v1 > v2);
            case '>=':
                return (v1 >= v2);
            case '&&':
                return !!(v1 && v2);
            case '||':
                return !!(v1 || v2);
            default:
                return false;
    }
}); 
 }

但是我有以下错误，请有人给我一些建议，谢谢

contacts.hbs:41 Uncaught Error: Module build failed (from ./.webpack/webpack-handlebars.js):
Error: if doesn't match each - 372:59
    at validateClose (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:11014:13)
    at Object.prepareBlock (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:11125:7)
    at Object.anonymous (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:8339:25)
    at Parser.parse (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:10142:38)
    at parse (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:11271:36)
    at preprocess (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:5817:71)
    at precompile (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:3949:38)
    at Object.precompile (C:\SourceCode\IMS\Development\IMS\IMS.Ember\node_modules\ember-source\dist\ember-template-compiler.js:8119:37)
    at Object.module.exports (C:\SourceCode\IMS\Development\IMS\IMS.Ember\.webpack\webpack-handlebars.js:15:29)
    at Object.<anonymous> (http://localhost:58799/Ember/dist/templates.js?version=1572992916177.89:22620:7)

contacts.hbs:41未捕获错误：模块构建失败（来自./.webpack/webpack handlebar.js）：
错误：如果不匹配-372:59
在validateClose（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember-source\dist\Ember-template-compiler.js:11014:13）
在Object.prepareBlock（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:11125:7）
在Object.anonymous（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:8339:25）
在Parser.parse（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:10142:38）
解析时（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:11271:36）
预处理时（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:5817:71）
在预编译时（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember source\dist\Ember template compiler.js:3949:38）
在Object.precompile（C:\SourceCode\IMS\Development\IMS\IMS.Ember\node\u modules\Ember-source\dist\Ember-template-compiler.js:8119:37）
在Object.module.exports（C:\SourceCode\IMS\Development\IMS\IMS.Ember\.webpack\webpack handlebar.js:15:29）
反对。(http://localhost:58799/Ember/dist/templates.js?version=1572992916177.89:22620:7)

符号告诉车把在以下情况下需要一个“`/}}”符号：

{{#if true}}
  do something
{{/if}}

但是，如果您将代码修改为

---

{{if（ifCond'testing'==''testing'true）}

这个错误会消失。

看起来你正在尝试重新发明余烬真理助手、余烬数学助手等。正如@Gaurav提到的余烬模板助手插件将优雅地处理这种情况。然而，在余烬中应该是直截了当的。这是你的助手的一个示例实现。是的，我没有注意到，但现在它是“sayingember.debug.js:43618未捕获（承诺中）错误：编译错误：ifCond不是助手”有任何帮助吗？非常感谢。

{{#if true}}
  do something
{{/if}}