如果条件不起作用,手把 [英] Handlebar if condition not working
问题描述
。
下面是我下面的jquery Handlebars函数,
$。each(data.response,function(i,item) {
var source = $(#my-orders)。html();
var template = Handlebars.compile(source);
html + = template(item);
// alert(html);
}); (html){
$(#myorderss)。html(html);
}
当我使用 if $ c
$ $ $ $ $ $ $ {$#$> $ {$# {/ if}}
如果如果
条件在句柄模板?
解决方案这是if条件的误解。
请看这里的#if文档: http://handlebarsjs.com/builtin_helpers.html
您可以使用if助手来有条件地渲染块。如果它的
参数返回false,undefined,null,,0或[],Handlebars将
不呈现该块。
你需要做的是一个手柄助手来测试你的情况。
下面是一个我使用的测试助手的例子比较:
$ p $ Handlebars.registerHelper('test',function(lvalue,operator,rvalue,options){
var doDisplay = false;
var items =(+ rvalue).split(|);
var arrayLength = items.length;
for(var i = 0;(i < arrayLength); i ++){
if(operator ==eq){
if(lvalue == items [i]){
doDisplay = true;
}
} else if(operator ==ne){
if(lvalue!= items [i]){
doDisplay = true;
}
} else if(parseFloat(lvalue)> parseFloat(items [i])){
doDisplay = true;
}
} else if(operator ==lt){
if(parseFloat(lvalue)< parseFloat(items [i])){
doDisplay = true;
}
} else if(operator ==le){
if(parseFloat(lvalue)< = parseFloat(items [i])){
doDisplay = true ;
}
} else if(operator ==ge){
if(parseFloat(lvalue)> = parseFloat(items [i])){
doDisplay = true ;
}
}
}
if(doDisplay){
return options.fn(this);
} else {
return;
}
});
以下是您如何调用它以及如何测试并显示取决于test:
{{#test id'eq''1'}}
{{id}}等于1
{{/ test}}
{{#test id'ne''1'}}
{{id}}不等于1
{{/ test}}
{{#test id'ge''1'}}
{{id}}大于或等于1
{{/ test}}
{{#test id' ne''1'}}
{{id}}小于等于1
{{/ test}}
Unable to use if
condition in Handlbars template.
Below is my jquery Handlebars function below,
$.each(data.response, function (i, item) {
var source = $("#my-orders").html();
var template = Handlebars.compile(source);
html += template(item);
//alert(html);
});
if(html){
$("#myorderss").html(html);
}
When I'm using if
condition, its not working.
{{#if id=='1'}}
{{/if}}
How to use if
condition in handlebars template?
解决方案 This is a misunderstanding of the if condition.
Look at the #if documentation here : http://handlebarsjs.com/builtin_helpers.html
You can use the if helper to conditionally render a block. If its
argument returns false, undefined, null, "", 0, or [], Handlebars will
not render the block.
What you need to do is a handlebar helper to test your condition.
Here is one example of a "test" helper that I use to do comparisons :
Handlebars.registerHelper('test', function(lvalue, operator, rvalue, options) {
var doDisplay = false;
var items = (""+rvalue).split("|");
var arrayLength = items.length;
for (var i = 0; (i < arrayLength); i++) {
if (operator == "eq") {
if (lvalue == items[i]) {
doDisplay = true;
}
} else if (operator == "ne") {
if (lvalue != items[i]) {
doDisplay = true;
}
} else if (operator == "gt") {
if (parseFloat(lvalue) > parseFloat(items[i])) {
doDisplay = true;
}
} else if (operator == "lt") {
if (parseFloat(lvalue) < parseFloat(items[i])) {
doDisplay = true;
}
}else if (operator == "le") {
if (parseFloat(lvalue) <= parseFloat(items[i])) {
doDisplay = true;
}
}else if (operator == "ge") {
if (parseFloat(lvalue) >= parseFloat(items[i])) {
doDisplay = true;
}
}
}
if (doDisplay) {
return options.fn(this);
} else {
return "";
}
});
and here is how you call it for example if you and to test and display a result depending on the test:
{{#test id 'eq' '1'}}
{{id}} equals 1
{{/test}}
{{#test id 'ne' '1'}}
{{id}} do not equals 1
{{/test}}
{{#test id 'ge' '1'}}
{{id}} greater or equals 1
{{/test}}
{{#test id 'ne' '1'}}
{{id}} lower or equals 1
{{/test}}
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