meteor，mongodb，spacebars，我如何只显示2位小数

Question

I have a collection that has values like { "pctFail" : "0.3515500159795462" } and when I pass this to a template and display as {{myTemplate}}% it displays in my html as 0.3515500159795462%. How do I display this as 0.35% ?

Answer 1

You could override the data context's property with a template helper method:

Template.myTemplate.helpers({
  pctFail: function () { return this.pctFail.toFixed(2); }
})

And then use {{pctFail}}% as before. If you insist on storing the numerical property as a string, you'll need to return something like parseFloat(this.pctFail).toFixed(2) instead.

Answer 2

You can also solve this problem by using a helper function http://docs.meteor.com/#/full/template_registerhelper which can be used from all templates like so:

Template.registerHelper('toFixed', function (x, decimals) {
    return x.toFixed(decimals);
})

and then you can use:

 {{toFixed item.pctFail 2}}

If you insist on storing the numerical property as a string, you'll need to return something like

parseFloat(x).toFixed(decimals)

instead.

Answer 3

You could do something like this using substrings

Template,myTemplate.helpers({
    pctFail: function () {
        return this.pctFail.substring(0, 4);
    }
)};