css clip-path little gap between

Question

The code is below. gradient there is a very small gap between two divs.but it should not have.

.gra {
  position: absolute;
  width: 200px;
  height: 200px;
}

.left {
  background: linear-gradient(0deg, red 0%, blue 100%);
  clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
}

.right {
  background: linear-gradient(270deg, red 0%, blue 100%);
  clip-path: polygon(0% 0%, 100% 0%, 100% 100%);
}

<div class='gra left'></div>
<div class='gra right'></div>

Answer 1

It's happening because of Antialiasing.

Use left:0; with the left class and left: -1px; with the right class to overlap Antialiasing

.gra {
  position: absolute;
  width: 200px;
  height: 200px;
}

.left {
  background: linear-gradient(0deg, red 0%, blue 100%);
  clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
  left:0;
}

.right {
  background: linear-gradient(270deg, red 0%, blue 100%);
  clip-path: polygon(0% 0%, 100% 0%, 100% 100%);
  left: -1px;
}

<div class='gra left'></div>
<div class='gra right'></div>

Answer 2

You can change by:

clip-path: polygon(-1% 0%, 100% 0%, 100% 101%);

.gra {
  position: absolute;
  width: 200px;
  height: 200px;
}

.left {
  background: linear-gradient(0deg, red 0%, blue 100%) ;
  clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
}

.right {
  background: linear-gradient(270deg, red 0%, blue 101%);
  clip-path: polygon(-1% 0%, 100% 0%, 100% 101%);
}

<div class='gra left'></div>
<div class='gra right'></div>