315 vs 315。这些符号的html代码是什么？

Question

我不能用谷歌搜索像315这样看起来像数字3 15的符号的html代码。

有什么想法吗？谢谢。

Answer 1

在javascript中，您可以使用charCodeAt来获取字符的代码：

​

var char = prompt("Paste the character here: ");

var decimal = char.charCodeAt(0),
    hexa = decimal.toString(16);
    
console.log("Decimal code:", decimal);
console.log("Hexadecimal code:", hexa);

​

要将其作为文本添加到元素中，请使用以下命令：

element.innerHTML = "&#" + decimalCode + ";";

​

var p = document.querySelector("p"),
    char = "３";
    
p.innerHTML = "The char is: " + char + "<br>" + 
"The next char is: &#" + (char.charCodeAt(0) + 1) + ";";

<p></p>

​

不久前，我编写了一个代码来获取特定字符的周围字符：

​

var container = document.querySelector("#container"),
    inp = document.querySelector("#theChar"),
    before = document.querySelector("#before"),
    after = document.querySelector("#after");
    
document.querySelector("button").onclick = function() {
  container.innerHTML = "";
  var code = inp.value.charCodeAt(0),
      bef = +before.value,
      aft = +after.value;
  for(var i = code - bef; i <= code + aft; i++) {
    var div = document.createElement("div");
    div.innerHTML = "&#" + i + ";";
    container.appendChild(div);
  }
}

#container div {
  display: inline-block;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  margin: 3px;
  border: 1px solid black;
}

label {
  display: block;
}

<label>The character: <input id="theChar"></label>
<label>Characters before: <input type="number" id="before" value="10"/></label>
<label>Characters after: <input type="number" id="after" value="10"/></label>
<button>Show</button>
<div id="container"></div>

​