jQuery-将搜索延迟到输入完成

bwoodruff1

我想延迟搜索的触发，直到用户完成输入为止。我正在使用用mark.js（https://markjs.io）构建的函数。它在用户键入时进行搜索，并在搜索时跳至第一个结果。问题在于它会在您键入时搜索每个字母组合。IE：搜索“帮助”搜索“ h”，“ he”，“ hel”，“ help”。考虑到文档的大小，这太慢了。我可以使用此功能做什么，以使其等待用户输入完毕？

这是我正在使用的搜索功能：

    $(function() {

  // the input field
  var $input = $("input[type='search']"),
    // clear button
    $clearBtn = $("button[data-search='clear']"),
    // prev button
    $prevBtn = $("button[data-search='prev']"),
    // next button
    $nextBtn = $("button[data-search='next']"),
    // the context where to search
    $content = $(".container"),
    // jQuery object to save <mark> elements
    $results,
    // the class that will be appended to the current
    // focused element
    currentClass = "current",
    // top offset for the jump (the search bar)
    offsetTop = 150,
    // the current index of the focused element
    currentIndex = 0;

  /**
   * Jumps to the element matching the currentIndex
   */
  function jumpTo() {
    if ($results.length) {
      var position,
        $current = $results.eq(currentIndex);
      $results.removeClass(currentClass);
      if ($current.length) {
        $current.addClass(currentClass);
        position = $current.offset().top - offsetTop;
        window.scrollTo(0, position);
      }
    }
  }

  /**
   * Searches for the entered keyword in the
   * specified context on input
   */
  $input.on("input", function() {
    var searchVal = this.value;
    $content.unmark({
      done: function() {
        $content.mark(searchVal, {
          accuracy: "exactly",
          separateWordSearch: false,
          done: function() {
//Filter Results//$context.not(":has(mark)").hide();
            $results = $content.find("mark");
            currentIndex = 0;
            jumpTo();
          }
        });
      }
    });
  });

  /**
   * Clears the search
   */
  $clearBtn.on("click", function() {
    $content.unmark();
    $input.val("").focus();
  });

  /**
   * Next and previous search jump to
   */
  $nextBtn.add($prevBtn).on("click", function() {
    if ($results.length) {
      currentIndex += $(this).is($prevBtn) ? -1 : 1;
      if (currentIndex < 0) {
        currentIndex = $results.length - 1;
      }
      if (currentIndex > $results.length - 1) {
        currentIndex = 0;
      }
      jumpTo();
    }
  });
});

以下是一些HTML：

<input type="search" placeholder="Search" class="text-input" style="height: 28px; border-style: solid; border-color: black; border-width: 1px; margin-bottom: 3px;">
      <br/>
      <button data-search="next">Next</button>
      <button data-search="prev">Previous</button>
      <button data-search="clear">✖</button><br/>
<div class="container">
   <div>
     Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus elementum non arcu id tristique. Cras fringilla nisi erat, non ultricies leo varius eu. Duis venenatis enim sed tristique gravida. Nulla dolor augue, tempor non nisl eget, consequat consequat magna. Nulla quis elit nisl. Integer at tortor molestie, dignissim odio id, pharetra nunc. Maecenas scelerisque porta erat bibendum aliquet. Proin est felis, pretium sit amet consequat eu, aliquet ac erat. Donec tempus, libero sit amet rutrum posuere, leo ipsum gravida odio, quis sodales magna nisl ut lectus.
   </div>
</div>

查理

您可以使用计时器限制搜索功能的初始化，还可以检查是否存在最少字符数

就像是：

var searchTimer = null,
  minLength = 3,
  searchDelay = 300;

$input.on("input", function() {
  // clear previous timer
  clearTimeout(searchTimer);

  var searchVal = this.value;

  // don't do anything if not enough characters
  if (searchVal.length < minLength) {
    return;
  }  

  // start new timer
  searchTimer = setTimeout(function() {
    $content.unmark({
      done: function() {
        $content.mark(searchVal, {
          accuracy: "exactly",
          separateWordSearch: false,
          done: function() {
            //Filter Results//$context.not(":has(mark)").hide();
            $results = $content.find("mark");
            currentIndex = 0;
            jumpTo();
          }
        });
      }
    });
  }, searchDelay);
});

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