我想將網格中flexbox的文本區域內的文本居中。我努力去實現這一點，但(對我來說)似乎是不可能的。小提琴:

// Prepare Filters Global Display
  const myDocumentAreaFiltersGlobalDisplay = document.getElementById("document_area_filters_global_display_id")

  const myFiltersGlobalDisplayWrap = document.createElement("div");
  myFiltersGlobalDisplayWrap.classList.add("myFiltersGlobalDisplayWrap");

  // myFiltersGlobalDisplay = document.getElementById("filters_global_display_id");
  const myFiltersGlobalDisplay = document.createElement("textarea");
  myFiltersGlobalDisplay.classList.add("myFiltersGlobalDisplay");
  myFiltersGlobalDisplay.value = "CENTER ME PLEASE";

  myFilterGlobalResetButton = document.createElement("button");
  myFilterGlobalResetButton.textContent = "X";
  myFiltersGlobalDisplayWrap.appendChild(myFiltersGlobalDisplay);
  myFiltersGlobalDisplayWrap.appendChild(myFilterGlobalResetButton);

  myDocumentAreaFiltersGlobalDisplay.appendChild(myFiltersGlobalDisplayWrap);

/* Grid Layout */
.document_grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  gap: 0px;
  grid-template-areas:
    "document_area_filters_global_display";
}

html,
body,
.document_grid {
  height: 100%;
  margin: 0;
}

textarea {
  border: 1 px solid grey;
  resize: none;
  width: 100%;
  padding-top: 0px;
  padding-bottom: 0px;
  overflow: hidden;
}

.myFiltersGlobalDisplayWrap{
  display: flex;
  flex-direction: row;
  align-items: center;
}

.myFiltersGlobalDisplay{
  line-height: 1;
  text-align: right;
  padding-right: 5px;
}

<div class="document_area_filters_global_display" id="document_area_filters_global_display_id"></div>

最后，我得出結論，如果你想讓文本垂直居中，文本區不是正確的選擇。

所以我從textarea換成了div。我還將flexbox布局改為全網格布局，以便與父部分的布局更加一致。 在下面的代碼片段中，div中的內容是可編輯的，并且div將根據文本長度自動增長。

.color_green {
  background-color: lightgreen;
}

.document_area_filters_global_display {
  display: grid;
  width: 100%;
  grid-template-columns: 1fr auto;
  grid-template-rows: 1fr;
  grid-template-areas: 
  "filter_global_area reset_button_area";
}

.myFiltersGlobalDisplayWrap{
  grid-area: filter_global_area;
}

.myFiltersGlobalDisplay{
  margin-right: 5px;
  text-align: right;
}

.myFilterGlobalResetButtonWrap{
  grid-area: reset_button_area;
  height: 100%;
  justify-self: end;
  align-self: center;
}

.myFilterGlobalResetButton{
  height: 100%;
}

<div class="document_area_filters_global_display" id="document_area_filters_global_display_id">
  <div class="myFiltersGlobalDisplayWrap color_green">
    <div id="filters_global_display_id" class="myFiltersGlobalDisplay" contentEditable="true">Center me</div>
  </div>
  <div class="myFilterGlobalResetButtonWrap">
    <button class="myFilterGlobalResetButton" id="filters_global_display_reset_button_id">X</button>
  </div>
</div>