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javascript - 如何在变量前面键入文本

问题描述

我会尽力解释这一点。我正在制作一个域检查器，它对我有用，现在我有一个函数可以显示我在我的 var 中名为“domains”的一些域，一旦我输入一个点，因为所有变量域都以点开头域会出现，但是当我在放置 DOT 之前写一些文本时，它将不再出现。我必须更改什么才能让它在 DOT 之前显示文本？这是我使用的代码，以及一些图片现在的样子。

<body>
<center>
<h2>Autocomplete domein</h2>

<p>Start typing:</p>

<form autocomplete="off" action="#">
  <div class="autocomplete" style="width:300px;">
    <input id="myInput" type="text" name="myCountry" placeholder="Domain">
  </div>
  <input type="submit">
</form>
</center>
<script>
function autocomplete(inp, arr) {
  var currentFocus;
  inp.addEventListener("input", function(e) {
      var a, b, i, val = this.value;
      closeAllLists();
      if (!val) { return false;}
      currentFocus = -1;
      a = document.createElement("DIV");
      a.setAttribute("id", this.id + "autocomplete-list");
      a.setAttribute("class", "autocomplete-items");
      this.parentNode.appendChild(a);
      for (i = 0; i < arr.length; i++) {
        if (arr[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
          b = document.createElement("DIV");
          b.innerHTML = "<strong>" + arr[i].substr(0, val.length) + "</strong>";
          b.innerHTML += arr[i].substr(val.length);
          b.innerHTML += "<input type='hidden' value='" + arr[i] + "'>";
          b.addEventListener("click", function(e) {
              inp.value = this.getElementsByTagName("input")[0].value;
              closeAllLists();
          });
          a.appendChild(b);
        }
      }
  });
  inp.addEventListener("keydown", function(e) {
      var x = document.getElementById(this.id + "autocomplete-list");
      if (x) x = x.getElementsByTagName("div");
      if (e.keyCode == 40) {
        currentFocus++;
        addActive(x);
      } else if (e.keyCode == 38) { 
        currentFocus--;
        addActive(x);
      } else if (e.keyCode == 13) {
        e.preventDefault();
        if (currentFocus > -1) {
          if (x) x[currentFocus].click();
        }
      }
  });
  function addActive(x) {
    if (!x) return false;
    removeActive(x);
    if (currentFocus >= x.length) currentFocus = 0;
    if (currentFocus < 0) currentFocus = (x.length - 1);
    x[currentFocus].classList.add("autocomplete-active");
  }
  function removeActive(x) {
    for (var i = 1; i < x.length; i++) {
      x[i].classList.remove("autocomplete-active");
    }
  }
  function closeAllLists(elmnt) {
    var x = document.getElementsByClassName("autocomplete-items");
    for (var i = 0; i < x.length; i++) {
      if (elmnt != x[i] && elmnt != inp) {
        x[i].parentNode.removeChild(x[i]);
      }
    }
  }
  document.addEventListener("click", function (e) {
      closeAllLists(e.target);
  });
}

var domain = [".nl",".com",".net",".org",".network",".at",".co",".co.uk"
,".be",".bl",".us",".eu",".uk", ".lu"];

autocomplete(document.getElementById("myInput"), domain);
</script>

</body>

图片

标签： javascripthtmlautocomplete

解决方案

尝试

<body>
<center>
<h2>Autocomplete domein</h2>

<p>Start typing:</p>

<form autocomplete="off" action="#">
  <div class="autocomplete" style="width:300px;">
    <input id="myInput" type="text" name="myCountry" placeholder="Domain">
  </div>
  <input type="submit">
</form>
</center>
<script>
function autocomplete(inp, arr) {
  var currentFocus;
  inp.addEventListener("input", function(e) {
      var a, b, i, val = this.value;
      var name ='';
      if(this.value.indexOf('.')>=0){
        val =this.value.slice(this.value.indexOf('.'));
        name = this.value.slice(0,this.value.indexOf('.'));
      }
      closeAllLists();
      if (!val) { return false;}
      currentFocus = -1;
      a = document.createElement("DIV");
      a.setAttribute("id", this.id + "autocomplete-list");
      a.setAttribute("class", "autocomplete-items");
      this.parentNode.appendChild(a);
      for (i = 0; i < arr.length; i++) {
        if (arr[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
          b = document.createElement("DIV");
          b.innerHTML = name;
          b.innerHTML += "<strong>" + arr[i].substr(0, val.length) + "</strong>";
          b.innerHTML += arr[i].substr(val.length);
          b.innerHTML += "<input type='hidden' value='" + name + arr[i] + "'>";
          b.addEventListener("click", function(e) {
              inp.value = this.getElementsByTagName("input")[0].value;
              closeAllLists();
          });
          a.appendChild(b);
        }
      }
  });
  inp.addEventListener("keydown", function(e) {
      var x = document.getElementById(this.id + "autocomplete-list");
      if (x) x = x.getElementsByTagName("div");
      if (e.keyCode == 40) {
        currentFocus++;
        addActive(x);
      } else if (e.keyCode == 38) { 
        currentFocus--;
        addActive(x);
      } else if (e.keyCode == 13) {
        e.preventDefault();
        if (currentFocus > -1) {
          if (x) x[currentFocus].click();
        }
      }
  });
  function addActive(x) {
    if (!x) return false;
    removeActive(x);
    if (currentFocus >= x.length) currentFocus = 0;
    if (currentFocus < 0) currentFocus = (x.length - 1);
    x[currentFocus].classList.add("autocomplete-active");
  }
  function removeActive(x) {
    for (var i = 1; i < x.length; i++) {
      x[i].classList.remove("autocomplete-active");
    }
  }
  function closeAllLists(elmnt) {
    var x = document.getElementsByClassName("autocomplete-items");
    for (var i = 0; i < x.length; i++) {
      if (elmnt != x[i] && elmnt != inp) {
        x[i].parentNode.removeChild(x[i]);
      }
    }
  }
  document.addEventListener("click", function (e) {
      closeAllLists(e.target);
  });
}

var domain = [".nl",".com",".net",".org",".network",".at",".co",".co.uk"
,".be",".bl",".us",".eu",".uk", ".lu"];

autocomplete(document.getElementById("myInput"), domain);
</script>

</body>

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