587: Створена сторінка: Категорія:Потребує перекладу This empty template is useful for introducing spaces or line breaks in places where they would normally be auto-removed. To explain why this is needed, let's look at the following code first:

 Paragraph 1  {{#if: condition | Paragraph 2 }}  Paragraph 3

If all the condition is met, it works fine: Paragraph 1 {{#if: condition | Paragraph 2 }} Para...

2023-08-25T14:59:39Z

Створена сторінка: Категорія:Потребує перекладу <nowiki></nowiki><noinclude> This empty template is useful for introducing spaces or line breaks in places where they would normally be auto-removed. To explain why this is needed, let's look at the following code first: <pre> Paragraph 1 {{#if: condition | Paragraph 2 }} Paragraph 3 </pre> If all the condition is met, it works fine: Paragraph 1 {{#if: condition | Paragraph 2 }} Para...

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[[Категорія:Потребує перекладу]]
<nowiki></nowiki><noinclude>
This empty template is useful for introducing spaces or line breaks in places where they would normally be auto-removed.

To explain why this is needed, let's look at the following code first:

<pre>
Paragraph 1

{{#if: condition |
Paragraph 2
}}

Paragraph 3
</pre>

If all the condition is met, it works fine:

Paragraph 1

{{#if: condition |
Paragraph 2
}}

Paragraph 3

But if the condition isn't met, it will produce too much empty space, like this:

Paragraph 1

{{#if: |
Paragraph 2
}}

Paragraph 3

Let's try to improve on this by making sure we don't introduce empty paragraphs:

<pre>
Paragraph 1 {{#if: condition |

Paragraph 2
}}

Paragraph 3
</pre>

That works exactly as desired when the condition ''isn't'' met:

Paragraph 1 {{#if: |

Paragraph 2
}}

Paragraph 3

But... When the condition ''is'' met, it doesn't work as expected! It does this weird thing instead:

Paragraph 1 {{#if: condition |

Paragraph 2
}}

Paragraph 3

Why does that happen? It's because parser functions like {{code|#if}} strip all blanks (spaces and line breaks) that come before the first non-blank character, and after the last non-blank character. So the line breaks after {{code|<nowiki>{{#if: condition |</nowiki>}} are completely ignored!

This can be solved with the following trick. Note the use of the empty {{code|nowiki}} tag:

<pre>
Paragraph 1 {{#if: condition | <nowiki></nowiki>

Paragraph 2
}}

Paragraph 3
</pre>

The empty tag ends the blank auto-removal at the point it's inserted, so the line breaks that come after are not ignored.

It's tedious to write {{code|<nowiki></nowiki>}} every time, so you can instead use this blank template, which can fulfill the exact same purpose:

<pre>
Paragraph 1 {{#if: condition | {{blank}}

Paragraph 2
}}

Paragraph 3
</pre>

Result:

Paragraph 1 {{#if: condition | {{blank}}

Paragraph 2
}}

Paragraph 3
</noinclude>

Шаблон:Blank - Історія редагувань