View source for Template:Substitution/doc

{{Distinguish|Template:Subst|Template:Substituted}}
{{Documentation subpage}}
{{nosubst}} 
<templatedata>{
  "description": "Use this template to add a message box to a template's documentation subpage indicating if and how that template  should be substituted.",
  "params": {
    "first parameter": {
      "label": "1",
      "description": "Inserts any helpful or instructive text in bold font such as 'always' or 'never' between the words 'should' and 'be' in the resulting message box; if no such instruction is desired, this parameter should be entered as a single blank typed space (in this sense, the parameter is required: it must be an instructive word OR it must be a blank typed space—it must NOT be left with no entry",
      "type": "string",
      "example": "never",
      "default": "",
      "autovalue": "",
      "required": true},
      "second parameter": {
      "label": "2",
      "description": "This parameter takes any text you add to it and places it at the end of the sentence that the message box generates; it should NOT end in a period",
      "type": "string",
      "example": "unless older versions cannot be found",
      "default": "",
      "autovalue":"",
      "required": false
    }
  }
}</templatedata>


==Examples==
=== With middle text but no additional text at the end ===
<code><nowiki>{{Substitution|not}}</nowiki></code>

produces:

{{Substitution|not}}

=== With both middle text and additional text at the end===
<code><nowiki>{{Substitution|only (at least as of </nowiki>{{CURRENTYEAR}}<nowiki>)|if temperatures fall and it starts to snow}}</nowiki></code>

produces:

{{Substitution|only (at least as of {{CURRENTYEAR}})|if temperatures fall and it starts to snow}}

=== With no middle text but some additional text at the end===

<code><nowiki>{{Substitution| |if you wish to ensure your emoji's image remains the same even if its template's image is changed}}</nowiki></code>

produces:

{{Substitution| |if you wish to ensure your emoji image remains the same even if its template image is changed}}

==See also==
* {{tl|Nosubst}}
* {{tl|Subst only}}
* {{tl|Transclusionless}}

<includeonly>{{sandbox other||
[[Category:Template namespace templates]]
}}</includeonly>