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Template:Yesno-no
no
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This template is used on approximately 1,860,000 pages, or roughly 3% of all pages.
To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.
{{Yesno}}
(or {{YesNo}}) evaluates any input and produces a normalized yes or nil output, based on the content of the input and several configurable options. It is not used in article prose, but in coding complex templates.
Usage
The template distinguishes five different types of input, supplied on the first unnamed parameter:
  1. Yes: Case-insensitive forms of Yes, y, true, on, and 1; e.g.
    {{Yesno|yEs}}
  2. No: Case-insensitive forms of No, n, false, off, and 0; e.g.
    {{Yesno|nO}}
  3. Nothing: When the input is defined but either contains no value or consists of whitespace character only; i.e. {{Yesno|}} or
    {{Yesno| }}
  4. Negation: When the input is either ¬ or entirely missing; i.e.
    {{Yesno|¬}}
    or
    {{Yesno}}
  5. Anything else: e.g.
    {{Yesno|Purple monkey dish washer}}
By default, the template returns "yes" in the first and last case but returns nil (blank, empty string) in the other cases.
Two short-hand templates for the most common uses that override the default behavior:
  • or {{YesNo-Yes}} – always returns "yes" (or the specified replacement result in |yes=) unless an explicit negative value is given; i.e., it evaluates to "yes" even when the value is empty or missing.
  • {{yesno-no}}
    or {{YesNo-No}} – always returns "no" (or the specified replacement result in |no=) unless an explicit positive value is given; i.e., it evaluates to "no" even when the value is present, as long as it does not contain anything that resolves to "yes".
Customizing the output
Template's default output can be customized with five named parameters, respectively: |yes=, |no=, |blank=, |¬= and |def=. If these parameters are specified, the template response is as follows:
  1. Yes: Template returns the contents of |yes=, otherwise returns "yes". For example:
    • {{yesno|y|yes=Yeah}}
      results in "Yeah"
    • {{​yesno​|y|yes=bacon}}
      results in "bacon"
  2. No: Template returns the contents of |no=, otherwise returns blank. For example:
    • {{yesno|n|no=Nay}}
      results in "Nay"
    • {{yesno|n|no=ham}}
      results in "ham"
  3. Nothing: Template returns the contents of |blank=, or of |no= in absence of the former; otherwise, returns blank.
    • {{​yesno​|||blank=eggs}}
      results in "eggs"
    • {{yesno|||no=ham}}
      results in "ham"
    • {{​yesno​|||blank=eggs|no=ham}}
      results in "eggs"
  4. Negation: Template returns the contents of |¬=, otherwise returns blank. For example:
    {{​yesno​|¬|¬=sausage}}
    results in "sausage"
  5. Anything else: Template returns the contents of |def=, or of |yes= in absence of the former; otherwise, returns "yes".
    • {{yesno|purple monkey dish washer|def=cup of tea}}
      results in "cup of tea"
    • {{yesno|purple monkey dish washer|yes=bacon}}
      results in "bacon"
    • {{yesno|purple monkey dish washer|def=cup of tea|yes=bacon}}
      results in "cup of tea"
For the named parameters, use of a blank value is not the same as omitting the parameter. A blank named parameter tells the template that the customized return value is blank. For example:
  • {{yesno|purple monkey dish washer}}
    results in "yes"
  • {{yesno|purple monkey dish washer|def=}}
    results in "" [blank]
Logical distinctions
Overview of
{{yesno}}

logical values and their associated texts
Input
parameter 1
(1=)
In codeLogical return valueDefault
return text
Return text when set:
yes=Pos
no=Neg
blank=Blank
¬=Undefined
def=Def
Note
yes, y, true, 1*{{yesno|yes}}yes by definition"yes""Pos"* Case-insensitive (Y=y)
Some Text{{yesno|Some Text}}yes by default"yes""Def""Pos" when
def=[omitted]
no, n, false, 0*{{yesno|no}}no by definition"" [blank]"Neg"* Case-insensitive (N=n)
[blank]{{yesno|}}blank"" [blank]"Blank""Neg" when
blank=[omitted]
1=[blank]{{yesno|1=}}blank"" [blank]"Blank""Neg" when
blank=[omitted]
¬{{yesno|¬}}¬"" [blank]"Undefined"
[omitted]{{yesno}}¬"" [blank]"Undefined"
Comparison with related templates
Input parameter 1 (1=){{yesno}}{{yesno-yes}}{{yesno-no}}
yes, y, true, 1*"yes""yes""yes"
Some Text"yes""yes""no"
no, n, false, 0*"" [blank]"no""no"
[blank]"" [blank]"yes""no"
1=[blank]"" [blank]"yes""no"
¬"" [blank]"yes""no"
[omitted]"" [blank]"yes""no"
Full parameter list
Unnamed parameter 1= the input value to be evaluated. The other parameters (all named, all optional), are the return values for their respective logical outcome. When set, each one overrules their default return value.
{{yesno | | yes = | no = | blank= | ¬ = | def = }}
See also
  • Module:yesno
  • – variant of Yesno that defaults to "yes" if value is not explicitly negative
  • {{Yesno-no}}
    – variant of Yesno that defaults to "no" if value is not explicitly positive
TemplateData
This is the TemplateData documentation for this template used by VisualEditor and other tools; see the monthly parameter usage report for this template.
TemplateData for Yesno-no
This template normalises an input to be a yes or nil output.
Template parameters
ParameterDescriptionTypeStatus
Input value1The value to be evaluatedStringrequired
Output on yesyesSpecifies the output of the template when the input value is a case-insensitive forms of 'Yes', 'Y', 'True' or '1'Stringoptional
Output on nonoSpecifies the output of the template when the input value is a case-insensitive forms of 'No', 'N', 'False, or '0'Stringoptional
Output on blank inputblankSpecifies the output of the template when the input value is defined but is either empty or contains nothing but whitespace character(s)Stringoptional
Output on ¬¬Specifies the output of the template when the input value is either '¬' or entirely missing (undefined)Stringoptional
Definite outputdefSpecifies the output of the template when the input value is defined but not a form of 'yes', 'no', '1', '0', '¬' or blankStringoptional
The above documentation is transcluded from Template:Yesno/doc. (edit | history)
Editors can experiment in this template's sandbox (edit | diff) and testcases (create) pages.
Subpages of this template.
Last edited on 13 February 2018, at 20:27
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