除提供的答复外,还有一种办法是在投入中监测关键词。 我个人喜欢将<代码>类型=”编号“作为属性。 这里有。

<form action="#" method="post">
  Numbers: <input name="num" 
                  type="number"
                  min="1"
                  step="1"
                  onkeypress="return event.charCode >= 48 && event.charCode <= 57"
                  title="Numbers only">
  <input type="submit">
</form>

<>Edit:更好的办法。 主要的新闻发布会是deprecated 。 此外,在reg中还添加了除序号之外的一切内容[0-9]。

<input type="number" onkeydown="if(event.key=== . ){event.preventDefault();}"  oninput="event.target.value = event.target.value.replace(/[^0-9]*/g,  );">

<input type="number" onkeydown="if(event.key=== . ){event.preventDefault();}" onpaste="let pasteData = event.clipboardData.getData( text ); if(pasteData){pasteData.replace(/[^0-9]*/g,  );} " >

<input type="number" name="num" pattern="[0-9]" title="Numbers only">

详情 http://www.w3schools.com/tags/att_input_pattern.asp

FIDDLE<>>

<input type="number" onkeydown="return event.keyCode !== 190"> 

This will Restrict period(.) input.For any Key restriction: https://css-tricks.com/snippets/javascript/javascript-keycodes/

event.key and event.charCode are deprecated features and don t work well with mobile virtual keyboards. I ve done some research and this seems to be the easiest way to make it work.
Tested in Chrome and Firefox on Windows, in Chrome on Android and in Safari on iOS and seems to be working perfectly.

document.getElementById("myInput").addEventListener( beforeinput , e => {
  if (!(Number(e.data) >= 0 && Number(e.data) <= 9)) {
    e.preventDefault();
  }
});

/* unnecessary */
#myInput {
width: 24ch;
}

<input type="number" inputmode="numeric" placeholder="only a number can go here" id="myInput">

顺便说一句,这是我在这里的第一个职位,因此,如果我做任何错误的话,请告诉我。

You guys can try this This function does not allow user to paste unwanted characters and also disallow user to enter .+-E

var inputBox = document.getElementById("inputBox");
            
                var invalidChars = [
                    "-",
                    "+",
                    "e",
                    "."
                ];

                inputBox.addEventListener("input", function() {
                    this.value = this.value.replace(/[e+-.]/gi, "");
                });
                

                inputBox.addEventListener("keydown", function(e) {
                    if (invalidChars.includes(e.key)) {
                        e.preventDefault();
                    }
                });
 
         

<input type="number" id="inputBox" >

......

If error occured in your JS. You can add this ......$(document).ready(function() { code });

<input type="number" onkeypress="return event.charCode >= 48 && event.charCode <= 57"  name="quantity">

Try this :

<input type="number"  value=""  min="0" oninput="this.value=(parseInt(this.value)||0)" onkeypress="return !(event.charCode == 45||event.charCode == 46||event.charCode == 43)"  class="form-control" step="any" />

A simple regex can help sort with this issue .

var re = new regExp( [.]+) ;
if(!re.test(num)){listOfNumbers.push(num)};

在你处理多种文化和解释时,在投入上不要让用户类型成为一种可行的选择。

function isNumberKey(evt){
    var charCode = (evt.which) ? evt.which : evt.keyCode
    if (charCode > 31 && (charCode < 48 || charCode > 57 || charCode==46))
        return false;
    return true;     
}

如果有人仍然想找到解决办法,我就在座谈:

const val = 33.15;

console.log(String(val).includes(".")) // true

if(String(val).includes(".")){
   // the number is decimal
} else {
  // the number is not decimal
}

这种办法使用户只插入0到9个数字

<input type="number" name="intero" oninput="this.value = this.value.replace(/[^0-9]/g,   )" />

This worked for me for Angular 16, the sample rejects negative numbers also

 <input matInput type="number" placeholder="Price" required 
                   onkeydown="if(this.key=== . ){this.preventDefault();}"
                   oninput="this.value = Math.abs(this.value.replace(/[^0-9]*/g,  ))">

如果你想要接受负面数字,你可以使用

 <input matInput type="number" placeholder="Price" required formControlName="LimitPrice"
                   onkeydown="if(this.key=== . ){this.preventDefault();}"
                  >

我也遇到了同样的挑战,这里的复文有助于我把它放在桌面上,在文 Android、西里和 Chrome上工作。 我需要投入领域,只接受数字价值而不作弊。 这是我提出的:

<input id="inputField" type="number" inputmode="numeric" pattern="[0-9]*" />

document.getElementById("inputField").addEventListener( beforeinput , event => {
  const char = event.data;
  if (char != null && char !==    && !/^[0-9]*$/.test(char)) {
    event.preventDefault();
  }
});

这与建议。 差异在于,它不允许截断数字,还使后天线受到压力。 值得一提的是,它支持以有效的价值观,但并非无效的价值观。 我希望它能帮助其他人(或至少是我们自己的未来)。

可在上测试。