In AnQiCMS template development,wordwrapThe filter is a tool that seems simple but is easy to confuse people.Its main purpose is to wrap long text according to the specified length to maintain the neat and beautiful layout of the page.wordwrapAfter, the text may not break as expected, even leading to unnecessary white space in the layout.This is usually not caused by the filter itself adding extra spaces, but by insufficient understanding of its working principle or improper application scenarios.

To cleverly avoid these 'unnecessary spaces' or undesirable line break effects, we first need to understand deeplywordwrapThe operation mechanism of the filter, and select the appropriate processing strategy according to the content type.

UnderstandingwordwrapThe working principle of the filter

wordwrapThe design intention of the filter is to handle English, numbers, and otherspacesAs a word separator text. Its core logic is: to find spaces in the text without breaking the integrity of the words, and insert a line break when reaching or exceeding the specified character length.\n).

Let's look at an example in a document:

{{ "Lorem ipsum dolor sit amet, consectetur adipisici elit."|wordwrap:2|linebreaksbr|safe }}

This code will try to wrap every 2 characters and combinelinebreaksbrThe filter will\nConverted to HTML,<br />tags to achieve visible line breaks on the page. The output effect showswordwrapIt will try to break the text based on the specified length and spaces.

However, the key limitation is:wordwrapThe words will be separated by spaces.If it does not contain spaces, it is considered a word.Therefore, if the Chinese characters are continuous, they will not be wrapped.wordwrapIt will not be able to recognize "word" boundaries, thus it will not be able to insert line breaks.

“Unnecessary whitespace”：Understanding the actual problem

WhenwordwrapWhen the filter fails to work as expected, for example, if you pass a continuous Chinese text to it, it cannot find spaces to break it, then this text will be considered as a 'super long word'. It will not insert spaces at any position in it\n.

In this case, 'unnecessary whitespace' may not refer towordwrapThe filter actively adds extra space characters, but is caused by the following visual effects:

  1. Layout expansion:Continuous long text that is not line-wrapped may overflow in narrow containers (such as article sidebars, mobile views), stretching the parent container and causing chaos in page layout, with large areas of blank space or misaligned elements visually.
  2. Expectation not met:The user expects the text to automatically break off when reaching a certain number of characters, butwordwrapBecause of the lack of spaces, it was not achieved as expected, resulting in a gap in the tidy layout, and was mistakenly considered a 'whitespace' problem.
  3. Conflict with CSS:If there is special handling for text overflow in the CSS styles of the page (such asoverflow: hidden;），then the long text that does not wrap may be hidden, but the space it occupies still exists, or without other word break rules (such asword-break: break-all;）, it may cause the layout to be rigid.

In short, the core of the problem lies inwordwrapCannot intelligently break and wrap lines without spaces.

Practical strategies and techniques to avoid "blank"

To avoid these undesirable line breaks or layout issues, we need to adopt different strategies based on the actual content type and requirements.