小编ron*_*meh的帖子

我面临以下场景的JavaScript的Math.floor函数问题:

1)从8192和10484的值,

    if I type 8192.8  -> The Math.floor converts it into 8192.79

    if I type 8192.88  -> The Math.floor converts it into 8192.87

    if I type 8192.3  -> The Math.floor converts it into 8192.29

奇怪的是,除了上面给出的范围外,该功能运行正常.

HTML:
<div data-bind="text: popIncrease"></div>
<input type="text" data-bind="value: userInput,  valueUpdate: 'afterkeydown'" />

Javascript:

var ViewModel = function () {
var _self = this;
_self.userInput = ko.observable();
_self.popIncrease = ko.computed(function () {

        return parseFloat((Math.floor(_self.userInput() * 100) / 100)).toFixed(2);
});
};

ko.applyBindings(new ViewModel());

jsfiddle:https://jsfiddle.net/91z5bdy4/1/

当我用1000改变100它解决了错误但我不明白为什么这发生在第一个地方？