Can someone explain the functionality of the CSS Selector > * when used inside a Vue.js component?

Question

Can someone explain the functionality of the CSS Selector > * when used inside a Vue.js component?

While exploring the Vuestic admin dashboard tool, I noticed a glitch in the UI where the donut chart appeared larger than its container. I tried to troubleshoot and fix it for submission as a PR, but I encountered an unfamiliar CSS selector > * while debugging the Vue Chart Base class at this link, which puzzled me.

My understanding of > * in CSS: As the > selector retrieves all children, and the * selector selects every element on the page, I assumed that using this selector targets every child element specifically.

In the context of a Vue Component, I believe CSS is scoped to that particular component. Could anyone confirm if my interpretation is accurate or mistaken?

css vue.js vue-component

Answer 1

Answer №1

> * refers to every child element of something, excluding the root node of the DOM.

Although the universal selector * has low specificity, making it easy for other rules to override it, it serves as a useful fallback rule.

The applicability of this rule depends on where it is defined. For instance, if your Vue component generates nodes in the Shadow DOM and the CSS is specified there, then the rule should only pertain to that scope.

Answer 2

> * refers to every child element of something, excluding the root node of the DOM.

Although the universal selector * has low specificity, making it easy for other rules to override it, it serves as a useful fallback rule.

The applicability of this rule depends on where it is defined. For instance, if your Vue component generates nodes in the Shadow DOM and the CSS is specified there, then the rule should only pertain to that scope.

Answer 3

Answer №2

When using the selector parent > *, it targets all child elements of the parent element, not including children of those child elements. In the example below, I am changing the background-color of all child elements within the

<div id="first"></div>

to black with the CSS rule

#first > * {background-color: black;}

:

#first {
  padding: 16px;
  background-color: violet
}

#second {
  padding: 16px;
  background-color: lime;
}

.item {
  width: 30px;
  height: 30px;
  background-color: white;
  margin: 6px;
}

#first > * {
  background-color: black;
}

<div id="first">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

<div id="second">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

Answer 4

When using the selector parent > *, it targets all child elements of the parent element, not including children of those child elements. In the example below, I am changing the background-color of all child elements within the

<div id="first"></div>

to black with the CSS rule

#first > * {background-color: black;}

:

#first {
  padding: 16px;
  background-color: violet
}

#second {
  padding: 16px;
  background-color: lime;
}

.item {
  width: 30px;
  height: 30px;
  background-color: white;
  margin: 6px;
}

#first > * {
  background-color: black;
}

<div id="first">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

<div id="second">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

Can someone explain the functionality of the CSS Selector > * when used inside a Vue.js component?

Answer №1

Answer №2

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