Operators

Comparison Operators

eq

{{$eq value1 value2}}

Evaluates to true if value1 is equal to value2.

Arguments

Name	Description	Type	Required
value1	A static value or a variable path	StringNumberBoolean
value2	A static value or a variable path	StringNumberBoolean

Returns

(Boolean)

Example

Template

{{#if ($eq category "sports") }}Category is sports{{/if}}

Data

{
    "category":"sports"
}

Result

Category is sports

ne

{{$ne value1 value2}}

Evaluates to true if value1 is not equal to value2.

Arguments

Name	Description	Type	Required
value1	A static value or a variable path	StringNumberBoolean
value2	A static value or a variable path	StringNumberBoolean

Returns

(Boolean)

Example

Template

{{#if ($ne category "sports") }}Category is not sports{{/if}}

Data

{
    "category":"sports"
}

Result

This is a sports category

gt

{{$gt number1 number2}}

Evaluates to true if number1 is greater than the number2.

Arguments

Name	Description	Type	Required
number1	A static value or a variable path	Number
number2	A static value or a variable path	Number

Returns

(Boolean)

Example

Template

{{#if ($gt grand_total 1500) }}Grand total is greater than 1500{{/if}}

Data

{
    "grand_total": 1600
}

Result

Grand total is greater than 1500

lt

{{$lt number1 number2}}

Evaluates to true if number1 is less than number2.

Arguments

Name	Description	Type	Required
number1	A static value or a variable path	Number
number2	A static value or a variable path	Number

Returns

(Boolean)

Example

Template

{{#if ($lt score 50) }}Score is less than 50{{/if}}

Data

{
    "score": 25
}

Result

Score is less than 50

gte

{{$gte number1 number2}}

Evaluates to true if number1 is greater than or equal to number2.

Arguments

Name	Description	Type	Required
number1	A static value or a variable path	Number
number2	A static value or a variable path	Number

Returns

(Boolean)

Example

Template

{{#if ($gte score 50) }}Score is greater than or equal to 50{{/if}}

Data

{
    "score": 50
}

Result

Score is greater than or equal to 50

lte

{{$lte number1 number2}}

Evaluates to true if number1 is less than or equal to number2.

Arguments

Name	Description	Type	Required
number1	A static value or a variable path	Number
number2	A static value or a variable path	Number

Returns

(Boolean)

Example

Template

{{#if ($lte score 50) }}Score is less than or equal to 50{{/if}}

Data

{
    "score":50
}

Result

Content to display for sports

Identity Operators

isNull

{{$isNull value}}

Evaluates to true if value is null.

Arguments

Name	Description	Type	Required
value	A static value or a variable path	Any

Returns

(Boolean)

Example

Template

{{#if ($isNull category) }}Category is null{{/if}}

Data

{
    "category": null
}

Result

Category is null

isNotNull

{{$isNotNull value}}

Evaluates to true if value is not null.

Arguments

Name	Description	Type	Required
value	A static value or a variable path	Any

Returns

(Boolean)

Example

Template

{{#if ($isNotNull category) }}Category is not null{{/if}}

Data

{
    "category": "sports"
}

Result

Category is

isNil

{{$isNil value}}

Evaluates to true if value is null or undefined .

Arguments

Name	Description	Type	Required
value	A static value or a variable path	Any

Returns

(Boolean)

Example

Template

{{#if ($isNil category) }}Category is nil{{/if}}

Data

{
    "category":null
}

Result

Category is nil

isNotNil

{{$isNotNil value}}

Evaluates to true if value is not null or undefined.

Arguments

Name	Description	Type	Required
value	A static value or a variable path	Any

Returns

(Boolean)

Example

Template

{{#if ($isNotNil category) }}Category is not nil{{/if}}

Data

{
    "category":"sports"
}

Result

Category is not nil

isEmpty

{{$isEmpty path}}

Evaluates to true if the value of the variable path is undefined, null , an empty string ('') , empty object ({}), or an empty array ([]).

Arguments

Name	Description	Type	Required
path	A path to a variable to check for a value	Any

Returns

(Boolean)

Example

Template

{{#if ($isEmpty category )}}Category is empty{{/if}}

Data

{
    "name":"soccer"
}

Result

Category is empty

isNotEmpty

{{$isNotEmpty value}}

Evaluates to true if value is not undefined, null, an empty string (''), an empty object ({}), and not an empty array ([]).

Arguments

Name	Description	Type	Required
path	A path to a variable to check for a value	Any

Returns

(Boolean)

Example

Template

{{#if ($isNotEmpty category) }}Category is not empty{{/if}}

Data

{
    "category":"sports"
}

Result

Category is not empty

Array Operators

isIn

{{$isIn value array}}

Evaluates to true if value is in array.

Arguments

Name	Description	Type	Required
value	A static value or a variable path	StringNumberBoolean
array	Array of values to check for value	String ArrayNumber ArrayBoolean Array

Returns

(Boolean)

Example

Template

{{#if ($isIn "sports" categories) }}Sports is in categories{{/if}}

Data

{
    "categories":[
        "sports",
        "entertainment",
        "news"
    ]
}

Result

Sports is in categories

isNotIn

{{$isNotIn value array}}

Evaluates to true if value is not in array.

Arguments

Name	Description	Type	Required
value	A static value or a variable path	StringNumberBoolean
array	Array of values to check for value	String ArrayNumber ArrayBoolean Array

Returns

(Boolean)

Example

Template

{{#if ($isNotIn "sports" categories)}}Sports is not in categories{{/if}}

Data

{
    "categories":[
        "entertainment",
        "weather",
        "news"
    ]
}

Result

Sports is not in categories

String Operators

startsWith

{{$startsWith string1 string2}}

Evaluates to true if string1 starts with string2.

Arguments

Name	Description	Type	Required
string1	A static value or a variable path to check for string2	String
string2	A static value or a variable path to check for in string1	String

Returns

(Boolean)

Example

Template

{{#if ($startsWith movie "Bourne") }}Movie starts with Bourne{{/if}}

Data

{
    "movie":"Bourne Identity"
}

Result

Movie starts with Bourne

endsWith

{{$endsWith string1 string2}}

Evaluates to true if string1 ends with string2.

Arguments

Name	Description	Type	Required
string1	A static value or a variable path to check for string2	String
string2	A static value or a variable path to check for in string1	String

Returns

(Boolean)

Example

Template

{{#if ($endsWith movie "Story") }}Movie ends with Story{{/if}}

Data

{
    "movie":"Toy Story"
}

Result

Movie ends with Story

contains

{{$contains string1 string2}}

Evaluates to true if string1 exists in string2.

Arguments

Name	Description	Type	Required
string1	A static value or a variable path to check for string2	String
string2	A static value or a variable path to check for in string1	String

Returns

(Boolean)

Example

Template

{{#if ($contains movie "Bronx") }}Movie contains Bronx{{/if}}

Data

{
    "movie":"A Bronx Tale"
}

Result

Movie contains Bronx

doesNotContain

{{$doesNotContain string1 string2}}

Evaluates to true if string1 does not exist in string2.

Arguments

Name	Description	Type	Required
string1	A static value or a variable path to check for string2	String
string2	A static value or a variable path to check for in string1	String

Returns

(Boolean)

Example

Template

{{#if ($doesNotContian movie "Batman") }}Movie does not contain Batman{{/if}}

Data

{
    "movie":"The Dark Knight"
}

Result

Movie does not contain Batman

matches

{{$matches string expression}}

Returns true if string matches a regular expression.

Arguments

Name	Description	Type	Required
string	A static value or a variable path to evaluate the regular expression against	String
expression	Regular expression to evaluate	String

Returns

(Boolean)

Example

Template

{{#if ($matches category "^spo.*") }}Category matches regular expression{{/if}}

Data

{
    "category":"sports"
}

Result

Category matches regular expression

Logical Operators

Logical operators can be used in conjunction with #if statements and other operators to perform logical checks.

and

{{$and arg1 arg2 ...}}

Returns true if all arguments evaluate to true

Arguments

Name	Description	Type	Required
arg1	1st argument to evaluate	Boolean
arg2	2nd argument to evaluate	Boolean
...	Remaining arguments to evaluate	Boolean

Returns

(Boolean)

Example

This example checks if the qty is greater than 5 and the amount is less than 200

Template

{{$and ($gt qty 5) ($lt amount 200) }}

Data

{
    "amount": 150,
    "qty": 4
}

Result

true

or

{{$or arg1 arg2 ...}}

Returns true if any of the arguments evaluate to true

Arguments

Name	Description	Type	Required
arg1	1st argument to evaluate	Boolean
arg2	2nd argument to evaluate	Boolean
...	Remaining arguments to evaluate	Boolean

Returns

(Boolean)

Example

This example checks if the qty is greater than 5 or the amount is less than 200

Template

{{$or ($gt qty 5) ($lt amount 200) }}

Data

{
    "amount": 500,
    "qty": 4
}

Result

true