parseFloat does not work on mobile devices

问题

I am writing a very basic html calculator. The end result and user inputs are shown in "textDisplay_" area below:

<div id ="textDisplayRow_"> 
   <div id = "textDisplay_" class = "calcTextDisplay">0.0</div>
</div>

I also have a JavaScript code that gets and parses the displayed value into a float using these functions:

function getCurrentText() {
    "use strict";
    return document.getElementById("textDisplay_").innerHTML;
}

function getDisplayedNum() {
    "use strict";
    if (getCurrentText() === emptyMesg) {
        return maxSafeInt;
    }

    var t = 1*getCurrentText();
    //var t = parseFloat(getCurrentText(), 10); 

    if ((isNaN(t)) || (t === undefined)) {
        return 0;
    } else {
        return t;
    }
}

This code works beautifully on desktop browsers (I have tested it on Chrome, FireFox and IE) They all look good and lets say if I enter: 3.14*2 and press'=' they give me 6.28.

However on my android 4, using the latest versions of mobile chrome and firefox all the decimal numbers get rounded down! so If I punch in "3.14*2=", I will get "6"!

How can I fix this issue? I have looked at other posts containing parseFloat does not work and none of them are similar to this issue. Also both of give similar results:

1*getCurrentText();

parseFloat(getCurrentText(), 10);

One option is to write my own parseFloat (I have previously done this for a micro controller!) but I really dont wanna go that way.

Thanks a lot in advance.

回答1:

You can try:

var t = 1.0 * getCurrentText();

to get a float.

回答2:

I'm pretty sure that your problem is not what you think it is. Please visit this page on your desktop and mobile browser. For me, they produce the same results.

https://jsfiddle.net/xpkhqdLa/1/

With str being a string holding a floating point number, all of the below produce the same, proper floating-point value:

var values = [ str*1, 1*str, 1.0*str, parseFloat(str) ];

来源：https://stackoverflow.com/questions/36438586/parsefloat-does-not-work-on-mobile-devices

标签

javascript

mobile-chrome