CSS-de web sahypasynyň üç sütünli düzüminiň shemasy

Indi üç sütünli düzümi ýasaýaly. Bize nämäniň alnyp gelmelidiginiň mysaly:

Başlangyç üçin web sahypasynyň gurluşyny ýazaly:

html<div id="wrapper">
  <div id="header">
    header
  </div>
  <div id="container">
    <div id="left">
      left sidebar
    </div>
    <div id="content">
      content
    </div>
    <div id="right">
      right sidebar
    </div>
  </div>
  <div id="footer">
    footer
  </div>
</div>

"Wrapper"-iň giňligini kesgitläp, ony merkeze ýerleşdirýäris:

css#wrapper {
  width: 1100px;
  margin: 30px auto;
  border: 1px solid black;
}

"Container"-daky bloklary hatarlalyň:

css#container {
  display: flex;
}

Indi bloklaryň giňliklerini şeýle belleýäris, ýöne jemi "wrapper"-iň giňligine deň bolmaly:

css#content {
  width: 700px;
}
#left {
  width: 200px;
}
#right {
  width: 200px;
}

Indi bolsa margin goşup, olaryň giňligini mazmundan aýyryň:

css#content {
  width: 660px;
}
#left {
  width: 200px;
  margin-right: 20px;
}
#right {
  width: 200px;
  margin-left: 20px;
}

Galan stilleri goşaly:

css#content {
  width: 660px;
  height: 700px;
  padding: 20px;
  border: 1px solid black;
}
#left {
  width: 200px;
  margin-right: 20px;
  padding: 20px;
  border: 1px solid black;
}
#right {
  width: 200px;
  margin-left: 20px;
  padding: 20px;
  border: 1px solid black;
}

Jemleýji kody ýazaly:

html<div id="wrapper">
  <div id="header">
    header
  </div>
  <div id="container">
    <div id="left">
      left sidebar
    </div>
    <div id="content">
      content
    </div>
    <div id="right">
      right sidebar
    </div>
  </div>
  <div id="footer">
    footer
  </div>
</div>

css* {
  box-sizing: border-box;
}

#wrapper {
  width: 1100px;
  margin: 30px auto;
  border: 1px solid black;
}
#header {
  height: 200px;
  padding: 20px;
  border: 1px solid black;
}
#container {
  display: flex;
}
#content {
  width: 660px;
  height: 700px;
  padding: 20px;
  border: 1px solid black;
}
#left {
  width: 200px;
  margin-right: 20px;
  padding: 20px;
  border: 1px solid black;
}
#right {
  width: 200px;
  margin-left: 20px;
  padding: 20px;
  border: 1px solid black;
}
#footer {
  height: 200px;
  padding: 20px;
  border: 1px solid black;
}