CSS
ファイルに追加するだけです
textarea {resize: none}
html
sass
textarea {
position: relative;
z-index: 1;
min-width: 1141px;
min-height: 58px;
}
.resizer {
position: relative;
display: inline-block;
&:after {
content: "";
border-top: 8px solid #1c87c7;
border-left: 8px solid transparent;
border-right: 8px solid transparent;
-webkit-transform: rotate(-45deg);
z-index: 1;
opacity: 0.5;
position: absolute;
bottom: 1px;
right: -3px;
pointer-events: none;
}
}
.arrow-resizer-textarea {
height: 0;
width: 0;
border-top: 8px solid #1c87c7;
border-left: 8px solid transparent;
border-right: 8px solid transparent;
-webkit-transform: rotate(-45deg);
position: absolute;
bottom: 1px;
right: -3px;
pointer-events: none;
z-index: 2;
}