我有一個(gè)文本字段，需要除以某些輸入。我嘗試使用下面的代碼，但遇到了問題。它不考慮小數(shù)點(diǎn)，如果使用小數(shù)點(diǎn)，將返回 0。<input id="number" type="text"> ÷ 3.181818<br />Your output is: <div id="output"></div><script type="text/javascript">//obtain reference to number html elementvar number = document.getElementById('number');//obtain reference to output html elementvar output = document.getElementById('output');//what you want to divide tovar division = '3.181818'; // can't be 0, or the world will explode//add an eventlistener to the change event on the number elementnumber.addEventListener('keyup', function(e) { //get the value from the input var val = parseFloat(number.value); //check if it is a nan if(!isNaN(val)) { //round it to 0 digits output.innerHTML = (val / division).toFixed(0) + ""; } else { output.innerHTML = 'that\'s not a number!'; }});</script>因此，例如，如果有人在文本框中輸入他們的敏感度為1.2，那么就會(huì)這樣做1.2 / 3.181818 = 0.377142878690.37714287869成為他們新的敏感性。
1 回答
翻過高山走不出你
TA貢獻(xiàn)1875條經(jīng)驗(yàn) 獲得超3個(gè)贊
刪除toFixed并設(shè)置div為浮動(dòng)3.181818：
//obtain reference to number html element
var number = document.getElementById('number');
//obtain reference to output html element
var output = document.getElementById('output');
//what you want to divide to
var division = 3.181818; // can't be 0, or the world will explode
//add an eventlistener to the change event on the number element
number.addEventListener('keyup', function(e) {
//get the value from the input
var val = parseFloat(number.value);
//check if it is a nan
if (!isNaN(val)) {
output.innerHTML = val / division;
} else {
output.innerHTML = 'that\'s not a number!';
}
});
<input id="number" type="text"> ÷ 3.181818<br /> Your output is:
<div id="output"></div>
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