93. Module Introduction

Jul 15, 2026 01:01 · 1:23 · English · Whisper Turbo · 2 স্পিকার
এই ট্ৰান্সক্ৰিপ্টৰ মেয়াদ আজি শেষ হয়। স্থায়ী সংৰক্ষণৰ বাবে উন্নীত কৰক →
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S… Speaker 1 (93. Module Introduction)
Time to take another look at directives and not only repeat quickly
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S… Speaker 1 (93. Module Introduction)
what we learned thus far,
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S… Speaker 1 (93. Module Introduction)
but also learn how to build our own directives and really
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S… Speaker 1 (93. Module Introduction)
dive into the difference between attribute and structural directives and what this star
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S… Speaker 1 (93. Module Introduction)
means on the structural directives.
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S… Speaker 2 (93. Module Introduction)
Well,
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S… Speaker 1 (93. Module Introduction)
I already said it,
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S… Speaker 1 (93. Module Introduction)
right? We got attribute and structural directives.
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S… Speaker 1 (93. Module Introduction)
Attribute directives are called like this because they sit
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S… Speaker 1 (93. Module Introduction)
on elements just like attributes and structural directives
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S… Speaker 1 (93. Module Introduction)
basically do the same,
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S… Speaker 1 (93. Module Introduction)
but they also change the structure of the DOM around this element.
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S… Speaker 1 (93. Module Introduction)
If you have ngf on a paragraph,
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S… Speaker 1 (93. Module Introduction)
if that condition is false,
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S… Speaker 1 (93. Module Introduction)
this paragraph is removed from the DOM,
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so the overall view container is affected.
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S… Speaker 1 (93. Module Introduction)
Whereas on the attribute directive,
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S… Speaker 1 (93. Module Introduction)
you never destroy an element from the DOM,
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you only change properties of that element,
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S… Speaker 1 (93. Module Introduction)
for example,
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S… Speaker 1 (93. Module Introduction)
the background color.
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S… Speaker 1 (93. Module Introduction)
So that is why we have attribute directives only affecting the
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S… Speaker 1 (93. Module Introduction)
element they sit on and structural directives,
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S… Speaker 1 (93. Module Introduction)
which also affect the whole DOM or the view container,
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S… Speaker 1 (93. Module Introduction)
the area around the element which they were placed on.
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S… Speaker 1 (93. Module Introduction)
That is the difference.
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S… Speaker 1 (93. Module Introduction)
Now with that,
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S… Speaker 1 (93. Module Introduction)
let's briefly have a look at the directives we already know and how
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S… Speaker 1 (93. Module Introduction)
to use them before we then dive into building our own ones and learn more about structural
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S… Speaker 1 (93. Module Introduction)
directives.

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