Struggling to grasp the concept of Vue3 style binding

While browsing the Vue website, I came across a particular example that left me puzzled. Inside the <script> section, there is this code:

const color = ref('green')
function toggleColor() {
  color.value = color.value === 'green' ? 'blue' : 'green'
}

Then, within the <template> section:

<p :style="{ color }" @click="toggleColor">
    The text inside this paragraph should initially display in green and switch between green and blue on click.
</p>

I find myself struggling to grasp how :style="{ color }" actually functions. Can anyone provide some clarity on this for me?

I've attempted to look for solutions online but haven't come across another instance of this. I've also tried experimenting with different methods such as removing the curly braces, but unfortunately, nothing seems to work.

Answer №1

I believe the proper code should read as follows:

:style="{ textColor: color }"
. This concept draws from the object notation found in JavaScript, where the key and corresponding value can be expressed simply by using the same word.

<p :style="{ textColor: color }" @click="changeColor">
  The text should display in green initially, switching between green and blue when clicked.
</p>

Answer №2

The distinction between the style and the :style attribute lies in their functionality. The style attribute is static, while the :style attribute is dynamic. This means that the value of :style is not restricted to plain text; you can perform JavaScript operations within it, as demonstrated in your example. Instead of passing the word "color," the content of the variable color is passed to the attribute. The function toggleColor() function toggles the value of the variable color, and by using @click="toggleColor", the function is called when the element is clicked. Therefore, each time the element is clicked, the color should change. I hope this explanation clarifies things for you.

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