How to position three divs horizontally

Tags: html,css

Problem :

I want to get structure like this:

| head                                      |
| fixed   ||                     |          |
|         ||    content-left     | con-right|
|         ||--------------------------------| 

css file:

.left-menu {
    position:fixed; /* fix menu, no scroll  */
.content-div {
.content-right {
    width: 310px;
    float: right;
.content-left {
    float: left;


    <div class="left-menu" >    </div>

    <div class="content-div">
        <div class="content-left">  </div>
        <div class="content-right"> </div>

I get content-right in the next line, not in the same line with content-left, like i have content-left width=105%, but i don't. I tried this and some other suggestion, but no luck. How can i fix this problem?

Solution :

Flexbox can do that.

* {
  margin: 0;
  padding: 0;
.parent {
  display: flex;
  height: 100vh;
.left-menu {
  position: fixed;
  /* fix menu, no scroll  */
  left: 0;
  width: 150px;
  background: red;
  height: 100%;
.content-div {
  margin-left: 150px;
  background: blue;
  flex: 1;
  display: flex;
.content-right {
  flex: 0 0 310px;
.content-left {
  flex: 1;
  background: orange;
<div class="parent">
  <div class="left-menu"></div>
  <div class="content-div">
    <div class="content-left"></div>
    <div class="content-right"></div>

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