测量输入时间

Question

我有一个包含多个输入和选择的简单测验表格，我需要测量参赛者 write/choose 回答所花费的时间。

这就是我正在尝试的方法，但它报告的时间不正确：

$('input, select').on('focus', function(event) {

    el = $(this);

    name = el.attr('name'); // console.log(name);
    a = performance.now();
    a_value = el.val();

    console.log(name + ' focused.');

    $(el).on('input select cut copy paste', function(event) {
        console.log('el: ' + el);
        b_value = el.val();
        if (a_value != b_value) {
            b = performance.now();
            if (name in times) {
                console.log('exists');
                times[name] = times[name] + (b - a);
            } else {
                times[name] = b - a;
            }
        }
    });

    $(el).on('blur', function(event) {
        alert(times);
    });

});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>

  <input type="text" name="" id="">
  <select name="" id="">
    <option value="">option1</option>
    <option value="">option2</option>
  </select>
  
</body>
</html>

Answer 1

试试这个..

<script>
  var Stopwatch = (function() {
            var s;
            return {
                settings: {
                    stop: 0,
                    sw: document.querySelectorAll(".stopwatch")[0],
                    results: document.querySelectorAll(".results")[0],
                    mills: 0,
                    secs: 0,
                    mins: 0,
                    i: 1,
                    times: ["00:00:00"],
                    clearButton: "<a href=\"#\" class=\"button\" onClick=\"Stopwatch.clear();\">Clear</a>"
                },
                init: function() {
                    s = this.settings;
                    setInterval(this.timer, 1);
                },
                clear: function() {
                    s.i = 1,
                    s.times = ["00:00:00"],
                    s.results.innerHTML = s.clearButton;
                },
                lap: function() {
                    if (s.i === 1) {
                        s.results.innerHTML = s.clearButton;
                    }
                    s.times.push(("0" + s.mins).slice(-2) + ":"
                                         + ("0" + s.secs).slice(-2) + ":"
                                         + ("0" + s.mills).slice(-2));
                    var diffTime = ("0" + Math.floor(s.times[s.i].split(":")[0]
                                             - s.times[s.i-1].split(":")[0])).slice(-2)
                                             + ":"
                                             + ("0" + Math.floor(s.times[s.i].split(":")[1]
                                             - s.times[s.i-1].split(":")[1])).slice(-2)
                                             + ":"
                                             + ("0" + (s.times[s.i].split(":")[2]
                                             - s.times[s.i-1].split(":")[2])).slice(-2);
                    s.results.innerHTML = s.results.innerHTML + "<tr><td>"
                                                            + s.times[s.i] + "</td><td>"
                                                            + diffTime + "</td></tr>";
                    s.i++;
                },
                restart: function() {
                    s.mills = 0,
                    s.secs = 0,
                    s.mins = 0;
                    this.start();
                },
                start: function() {
                    s.stop = 0;
                },
                stop: function() {
                    s.stop = 1;
                },
                timer: function() {
                    if (s.stop === 0) {
                        if (s.mills === 100) {
                            s.secs++;
                            s.mills = 0;
                        }
                        if (s.secs === 60) {
                            s.mins++;
                            s.secs = 0;
                        }
                        s.sw.innerHTML = ("0" + s.mins).slice(-2) + ":"
                                                     + ("0" + s.secs).slice(-2) + ":"
                                                     + ("0" + s.mills).slice(-2);
                        s.mills++;
                    }
                }
            };
        })();
$('.textbox,.selectbox').focusin(function(event) {
 Stopwatch.init();
Stopwatch.restart();    
});
$('.textbox,.selectbox').on('blur', function(event) {
    Stopwatch.stop();
});

Working Fiddle Here

References

Answer 2

您可以在 this fiddle 中找到我尝试过的内容。对我来说，要点是你一遍又一遍地加起来，因为初始时间没有改变，而且你不止一次地添加了回答时间。

if (name in times) {
    console.log('exists');
    times[name] = times[name] + (b - a);
    //here you already had added (b1 - a) with b1 < b
    //either you reset 'a' here or you store the diff in a variable and sum it up at the end
} else {
    times[name] = b - a;
}

我将回答时间存储在一个变量中并添加到 blur 上的数组中，并尽量与您原来的方法保持一致。

不过，还有一些我想念的事情。这主要与作弊有关。据我所知，你只想计算真正的变化时间（从 focus 到最后一个 input，比如说，不计算从最后一个 input 到 blur 的时间绝对不是看页面和可能在写字板环境中写答案的时间）。

在一个公平和安全的系统中，恕我直言，考虑某人查看测验的时间要多于 s/he 实际写答案的时间。但这显然取决于测验的目的！

Answer 3

在与您（OP）交谈后，我对您的基本代码进行了一些调整。

首先，每次表单元素获得焦点时都会调用 .on('input ...')，因此事件处理程序会堆积起来。在模糊处理程序中调用相应的 .off('input ...') 来处理此问题。

接下来，要在 JavaScript 中创建关联数组，我们通常使用对象，所以我创建了 times = {}。

接下来，times[name] = times[name] + (b - a); 继续使用元素首次聚焦时 a 的初始时间值，因此聚合时间会快速累积。我们可以通过在之后设置 a = b; 来弥补这一点。

最后，为了跟踪 select 何时发生变化，就像输入发生变化时一样，我们可以在 select 时更新内部 selected 值，如 a_value = b_value; ]离子变了。

希望这就是您要找的。

var times = {};
$('input, select').on('focus', function(event) {
  var el = $(this);

  // This will get the name of the input or select. Is that right?
  // OP: yes, this becomes the key in the array
  var name = el.attr('name');
  var a = performance.now();
  var a_value = el.val();

  // This will attach an event handler over and over unless we 
  // unattach it. Please see "blur" below
  el.on('input select cut copy paste', function(event) {
    var b_value = el.val();

    // Initial values are updated as inputs change
    // so the times don't stack up
    if (a_value !== b_value) {
      b = performance.now();
      if (times.hasOwnProperty(name)) {
        console.log('exists');
        times[name] = times[name] + (b - a);
        a = b;
      } else {
        console.log('adding ' + name);
        times[name] = b - a;
      }
      a_value = b_value;
    }
  });

  el.one('blur', function(event) {
    console.dir(times);

    // Update the times display
    displayTimes();

    // Unattach the event handler added in on("focus")
    el.off('input select cut copy paste');
  });

  // For the demo
  function displayTimes() {
    // Output results
    var str = "";
    $.each(times, function(key, value) {
      str += key + " total time: " + value + "<br>";
    });
    $("#results").html(str);
  }

  // Periodically update the times just for the demo
  setInterval(displayTimes, 200);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="input" id="">
<select name="select" id="">
  <option value="option1">option1</option>
  <option value="option2">option2</option>
</select>
<div id="results"></div>

Answer 4

我为此制作了简单的 jquery 插件。它能够告诉您任何输入元素的总编辑时间（仅当实际使用编辑时）、第一次编辑时间和最后一次编辑时间。您还可以获得所有编辑时间。

(function () {
    var getTime = function () { return performance.now(); };
    function MeasureTime () {
        this.editTimes = [];
        this.currentEdit = null;
        this.lastEdit = {start:0, last: 0};
        this.firstEdit = 0;
    }
    MeasureTime.prototype = {
        setFirst: function () {
            this.firstEdit = getTime();
            this.setFirst = new Function();
        },
        startEdit: function (val) {
            this.setFirst();
            if(this.currentEdit == null) {
                this.currentEdit = {start: getTime(), last: getTime(), value: val};
                this.editTimes.push(0);
            } else {
                this.edit(val);
            }
        },
        edit: function (val) {
            if(this.currentEdit == null)
                  this.startEdit(val);
            else {
                var current = this.currentEdit;
                if(current.value == val)
                    return;
                current.last = getTime();
                this.editTimes.pop();
                this.editTimes.push(current.last - current.start);
            }
        },
        stopEdit: function () {
            if(this.currentEdit != null) {
                this.lastEdit = this.currentEdit;
                this.currentEdit = null;
            }
        },
        getEvent: function () {
            return new TimeMeasuredEvent(this.editTimes, this.currentEdit || this.lastEdit, this.firstEdit);
        }
    };
    function TimeMeasuredEvent (all, current, first) {
        this.all = all.slice(0);
        this.start = current.start;
        this.last = current.last;
        this.first = first;
    }
    TimeMeasuredEvent.prototype = {
        current: function () {
            return this.all[this.all.length-1];
        },
        total: function () {
            var sum = 0, a = this.all, l = a.length, i = -1;
            while(++i<l)
                sum+=a[i];
            return sum;
        }
    };
    function EnsureMeasureTime () {
        if (typeof(this.measureTimeData) === "undefined") {
            var mtd = this.measureTimeData = new MeasureTime();
            $(this).on('focus', function () {
                mtd.startEdit(this.value);
        $(this).on('input.measuretime select.measuretime cut.measuretime copy.measuretime paste.measuretime', function () {
           mtd.edit(this.value);
           $(this).trigger('timeMeasured', [mtd.getEvent()]); 
        });
            $(this).on('blur', function () {
                mtd.stopEdit();
                $(this).trigger('timeMeasured', [mtd.getEvent()]); 
                $(this).off('measuretime');
            });
        });
        }
    }
    $.fn.measureTime = function () {
        $(this).each(EnsureMeasureTime);
        return this;
    };
})();

示例用法（fiddle）：

var inputs = $('input, select');
inputs.measureTime();
var all = {};
inputs.on('timeMeasured', function (ev, data) {
    console.log(ev, data);
    all[ev.target.name] = data.total();
    console.log("First edit time: " + data.first);
    console.log("Last edit time: " + data.last);
    console.log("All edits durations: " + data.all.join(", "));
    console.log("Current edit duration: " + data.current());
    console.log("Total edit duration: " + data.total());
    var s = "";
    for(var n in all) {
        s+= n + ": " + all[n]+"\n";
    }
    $("#times").text(s);
});

您还可以通过 element.measureTimeData 访问原始 MeasureTime 对象以获取编辑时间。

测量输入时间

Measuring time for input

javascript

time

jquery

measure