如何根据条件更改 Javascript 中的活动文本和悬停文本？

Question

I have these divs that I use as buttons.

 var color_switch = 1; var tmbtns = document.getElementsByClassName("time-button"); for (var i = 0; i < tmbtns.length; i++) { tmbtns[i].addEventListener("click", function() { var current = document.getElementsByClassName("active2"); current[0].className = current[0].className.replace(" active2", ""); this.className += " active2"; }); }

 .time-buttons{ float: left; }.time-button{ float: left; padding: 0.2rem; padding-bottom: 0.3rem; margin-left: 1px; margin-right: 1px; cursor: pointer; color: lightgrey; width: 30px; text-align: center; }.active2, .time-button:hover{ color: red; }

 <div class="time-buttons"> <div class="time-button active2"><small>2h</small></div> <div class="time-button"><small>8h</small></div> <div class="time-button"><small>1d</small></div> <div class="time-button"><small>3d</small></div> <div class="time-button"><small>1w</small></div> <div class="time-button"><small>1m</small></div> </div>

How could I make it that when color_switch changes, the color that the text changes to also changes? So when color_switch = 1, the text is highlighted in red, and when color_switch = 2, the text is highlighted in blue, and so on?

Answer 1

For example, you can use switch in which you'll set to what color should the current element be painted.

 switch (color_switch) {
  case 1:
    this.style.color = "red";
    break;

  case 2:
    this.style.color = "blue";
    break;
 }

There are many possible solutions, here is one of them: https://jsfiddle.net/9bj86L72/

Answer 2

I think, the best practice is not merge css code in js, the best is create modifier classes and use it to map it in js. for example:

.time-buttons.type1 .time-button:hover {
  color: red;
}

.time-buttons.type2 .time-button:hover {
  color: red;
}

after in js according to de color_switch set the modifier class

document.querySelector('.time-buttons').className = document.querySelector('.time-buttons').className + " type" + color_switch

please view example in https://codepen.io/ricardocermeno/pen/ExojdVZ