BetterDiscordApp-v2/csseditor/src/styles/editor.scss

.editor {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    overflow: hidden;

    .vue-codemirror {
        display: flex;
        flex-direction: column;
        flex-grow: 1;
        overflow: hidden;

        &, & .CodeMirror {
            flex-grow: 1;
        }
    }
}