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float solution
body { margin: 0; }
#a {
background-color: lime;
width: 200px;
float: left;
height: 100vh
}
#b {
background-color: blue;
margin-left: 200px;
height: 100vh;
}<div id="a"></div>
<div id="b"></div>css grid
body {
margin: 0;
}
.gridcontainer {
display: grid;
grid-template-columns: 200px 1fr;
height: 100vh;
}
#a {
background-color: lime;
height: 100vh;
}
#b {
background-color: blue;
height: 100vh;
}<div class="gridcontainer">
<div id="a"></div>
<div id="b"></div>
</div>flexbox
body {
margin: 0;
}
.flexcontainer {
display: flex;
}
#a {
background-color: lime;
width: 200px;
height: 100vh;
}
#b {
background-color: blue;
height: 100vh;
width: calc(100% - 200px);
}<div class="flexcontainer">
<div id="a"></div>
<div id="b"></div>
</div>inline-block solution
body {
margin: 0;
}
.inlineblockcontainer {
font-size: 0;
}
.inlineblockcontainer>div {
display: inline-block;
}
#a {
background-color: lime;
font-size: 16px;
width: 200px;
height: 100vh;
}
#b {
background-color: blue;
font-size: 16px;
height: 100vh;
width: calc(100% - 200px);
}<div class="inlineblockcontainer">
<div id="a"></div>
<div id="b"></div>
</div>
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solved What is the best way to fill the screen without jQuery [duplicate]