<script type="text/javascript">
            const map = (typeof Map === "function") ? new Map() : (function() {
            const keys = [];
            const values = [];
                return {
                    has(key) {
                        return keys.indexOf(key) > -1;
                    },
                    get(key) {
                        return values[keys.indexOf(key)];
                    },
                    set(key, value) {
                        if (keys.indexOf(key) === -1) {
                            keys.push(key);
                            values.push(value);
                        }
                    },
                    delete(key) {
                        const index = keys.indexOf(key);
                        if (index > -1) {
                            keys.splice(index, 1);
                            values.splice(index, 1);
                        }
                    },
                }
            })();
            let createEvent = (name) => new Event(name, {
                bubbles: true
            });
            try {
                new Event('test');
            } catch (e) {
                // IE does not support `new Event()`
                createEvent = (name) => {
                    const evt = document.createEvent('Event');
                    evt.initEvent(name, true, false);
                    return evt;
                };
            }

            function assign(ta) {
                if (!ta || !ta.nodeName || ta.nodeName !== 'TEXTAREA' || map.has(ta)) return;
                let heightOffset = null;
                let clientWidth = null;
                let cachedHeight = null;

                function init() {
                    const style = window.getComputedStyle(ta, null);
                    if (style.resize === 'vertical') {
                        ta.style.resize = 'none';
                    } else if (style.resize === 'both') {
                        ta.style.resize = 'horizontal';
                    }
                    if (style.boxSizing === 'content-box') {
                        heightOffset = -(parseFloat(style.paddingTop) + parseFloat(style.paddingBottom));
                    } else {
                        heightOffset = parseFloat(style.borderTopWidth) + parseFloat(style.borderBottomWidth);
                    }
                    // Fix when a textarea is not on document body and heightOffset is Not a Number
                    if (isNaN(heightOffset)) {
                        heightOffset = 0;
                    }
                    update();
                }

                function changeOverflow(value) {
                    {
                        // Chrome/Safari-specific fix:
                        // When the textarea y-overflow is hidden, Chrome/Safari do not reflow the text to account for the space
                        // made available by removing the scrollbar. The following forces the necessary text reflow.
                        const width = ta.style.width;
                        ta.style.width = '0px';
                        // Force reflow:
                        /* jshint ignore:start */
                        ta.offsetWidth;
                        /* jshint ignore:end */
                        ta.style.width = width;
                    }
                    ta.style.overflowY = value;
                }

                function getParentOverflows(el) {
                    const arr = [];
                    while (el && el.parentNode && el.parentNode instanceof Element) {
                        if (el.parentNode.scrollTop) {
                            arr.push({
                                node: el.parentNode,
                                scrollTop: el.parentNode.scrollTop,
                            })
                        }
                        el = el.parentNode;
                    }
                    return arr;
                }

                function resize() {
                    if (ta.scrollHeight === 0) {
                        // If the scrollHeight is 0, then the element probably has display:none or is detached from the DOM.
                        return;
                    }
                    const overflows = getParentOverflows(ta);
                    const docTop = document.documentElement && document.documentElement.scrollTop; // Needed for Mobile IE (ticket #240)
                    ta.style.height = '';
                    ta.style.height = (ta.scrollHeight + heightOffset) + 'px';
                    // used to check if an update is actually necessary on window.resize
                    clientWidth = ta.clientWidth;
                    // prevents scroll-position jumping
                    overflows.forEach(el => {
                        el.node.scrollTop = el.scrollTop
                    });
                    if (docTop) {
                        document.documentElement.scrollTop = docTop;
                    }
                }

                function update() {
                    resize();
                    const styleHeight = Math.round(parseFloat(ta.style.height));
                    const computed = window.getComputedStyle(ta, null);
                    // Using offsetHeight as a replacement for computed.height in IE, because IE does not account use of border-box
                    var actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(computed.height)) : ta.offsetHeight;
                    // The actual height not matching the style height (set via the resize method) indicates that
                    // the max-height has been exceeded, in which case the overflow should be allowed.
                    if (actualHeight < styleHeight) {
                        if (computed.overflowY === 'hidden') {
                            changeOverflow('scroll');
                            resize();
                            actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
                        }
                    } else {
                        // Normally keep overflow set to hidden, to avoid flash of scrollbar as the textarea expands.
                        if (computed.overflowY !== 'hidden') {
                            changeOverflow('hidden');
                            resize();
                            actualHeight = computed.boxSizing === 'content-box' ? Math.round(parseFloat(window.getComputedStyle(ta, null).height)) : ta.offsetHeight;
                        }
                    }
                    if (cachedHeight !== actualHeight) {
                        cachedHeight = actualHeight;
                        const evt = createEvent('autosize:resized');
                        try {
                            ta.dispatchEvent(evt);
                        } catch (err) {
                            // Firefox will throw an error on dispatchEvent for a detached element
                            // https://bugzilla.mozilla.org/show_bug.cgi?id=889376
                        }
                    }
                }
                const pageResize = () => {
                    if (ta.clientWidth !== clientWidth) {
                        update();
                    }
                };
                const destroy = (style => {
                    window.removeEventListener('resize', pageResize, false);
                    ta.removeEventListener('input', update, false);
                    ta.removeEventListener('keyup', update, false);
                    ta.removeEventListener('autosize:destroy', destroy, false);
                    ta.removeEventListener('autosize:update', update, false);
                    Object.keys(style).forEach(key => {
                        ta.style[key] = style[key];
                    });
                    map.delete(ta);
                }).bind(ta, {
                    height: ta.style.height,
                    resize: ta.style.resize,
                    overflowY: ta.style.overflowY,
                    overflowX: ta.style.overflowX,
                    wordWrap: ta.style.wordWrap,
                });
                ta.addEventListener('autosize:destroy', destroy, false);
                // IE9 does not fire onpropertychange or oninput for deletions,
                // so binding to onkeyup to catch most of those events.
                // There is no way that I know of to detect something like 'cut' in IE9.
                if ('onpropertychange' in ta && 'oninput' in ta) {
                    ta.addEventListener('keyup', update, false);
                }
                window.addEventListener('resize', pageResize, false);
                ta.addEventListener('input', update, false);
                ta.addEventListener('autosize:update', update, false);
                ta.style.overflowX = 'hidden';
                ta.style.wordWrap = 'break-word';
                map.set(ta, {
                    destroy,
                    update,
                });
                init();
            }

            function destroy(ta) {
                const methods = map.get(ta);
                if (methods) {
                    methods.destroy();
                }
            }

            function update(ta) {
                const methods = map.get(ta);
                if (methods) {
                    methods.update();
                }
            }
            let autosize = null;
            // Do nothing in Node.js environment and IE8 (or lower)
            if (typeof window === 'undefined' || typeof window.getComputedStyle !== 'function') {
                autosize = el => el;
                autosize.destroy = el => el;
                autosize.update = el => el;
            } else {
                autosize = (el, options) => {
                    if (el) {
                        Array.prototype.forEach.call(el.length ? el : [el], x => assign(x, options));
                    }
                    return el;
                };
                autosize.destroy = el => {
                    if (el) {
                        Array.prototype.forEach.call(el.length ? el : [el], destroy);
                    }
                    return el;
                };
                autosize.update = el => {
                    if (el) {
                        Array.prototype.forEach.call(el.length ? el : [el], update);
                    }
                    return el;
                };
            }
            export default autosize;
            autosize(document.querySelector('textarea'));
        </script>