perspective-viewer 4.4.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
Documentation 
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/* ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
 * ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
 * ┃ ▄▄▄▄▄█ █▄▄▄▄▄ ▄▄▄▄▄█  ▀▀▀▀▀█▀▀▀▀▀ █ ▀▀▀▀▀█ ████████▌▐███ ███▄  ▀█ █ ▀▀▀▀▀ ┃
 * ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
 * ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
 * ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
 * ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
 * ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
 * ┃ This file is part of the Perspective library, distributed under the terms ┃
 * ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
 * ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
 */

:host {
    #editor {
        display: flex;
        flex: 1 1 auto;
        position: relative;
        overflow-x: visible;
        overflow-y: auto;

        #editor-height-sizer {
            height: 100px;
        }

        #editor-inner {
            overflow: hidden;
            position: relative;
            display: flex;
            flex: 1 1 auto;
        }

        #line_numbers {
            color: var(--psp-inactive--color);
            background-color: var(--psp--background-color, white);
            box-sizing: border-box;
            display: flex;
            flex-direction: column;
            flex: 0 0 auto;
            font-family: var(--psp-interface-monospace--font-family, monospace);
            font-weight: 400;
            overflow: hidden;
            padding: 6px 0 6px 6px;
            pointer-events: none;
            span:after {
                color: var(--code-editor-error--color, red);
                white-space: pre;
                content: var(--status-icon--content, " X ");
                opacity: 0;
            }

            span.error_highlight:after {
                opacity: 1;
            }
        }

        pre#content {
            margin: 0 6px 6px 0;
            padding: 6px 0;
            /* margin-left: 36px; */
            box-sizing: border-box;
            pointer-events: none;
            font-weight: 400;
            font-family: var(--psp-interface-monospace--font-family, monospace);
            color: var(--code-editor-error--color, red);
            white-space: pre;
            overflow: hidden;

            span {
                /* display: contents; */
            }

            .comment {
                color: var(--psp-code-editor--comment--color, orange);
            }

            .operator {
                color: var(--psp-code-editor--operator--color, green);
            }

            .unknown {
                color: var(--code-editor-unknown--color, red);
            }

            .symbol {
                color: var(--psp-code-editor--symbol--color, #242526);
            }

            .column {
                color: var(--psp-code-editor--column--color, purple);
            }

            .literal {
                color: var(--psp-code-editor--literal--color, blue);
            }

            .error_highlight {
                /* background-color: */
                color: var(--code-editor-error--color, red);
                background-color: rgba(255, 0, 0, 0.1);
                border: 0px solid var(--code-editor-error--color, red);
                border-bottom-width: 1px;
                margin-bottom: -1px;
            }
        }

        #textarea_editable {
            position: absolute;
            width: 100%;
            height: 100%;
            font-family: var(--psp-interface-monospace--font-family, monospace);
            font-size: 1em;
            resize: none;
            padding: 6px 0;
            margin: 0;
            border: none;
            outline: none;
            color: transparent;
            caret-color: var(--psp-code-editor--symbol--color, #242526);
            white-space: pre;
            box-sizing: border-box;
            background-color: transparent;
        }

        &.wordwrap {
            #textarea_editable,
            #content {
                white-space: pre-wrap;
                word-wrap: break-word;
            }
        }
    }
}