# Component linkage
You can control whether other components are displayed through the value of the component through the control configuration item
# Property description
- value : Display components in - rulewhen the value of the component is congruent- { value:1, rule:[...] }
- handle - Function: Show components in- rulewhen- handlemethod returns- true- { handle:function(val, fApi){ return val === 1 }, rule:[...] }
- rule - Array: The component that controls the display- { value:1, rule:[ maker.number('满额包邮','postage_money',0) ] }
- append - string: Set the position of the rule appended in- rulev2.5.0+- { value:1, append:'goods_name' }
- prepend - string: Set the pre-insertion position of the rule in- rulev2.5.0+- { value:1, prepend:'goods_name' }
- child - boolean: Set whether the- ruleis inserted into the- childrenat the specified position, and is added to the- childrenof the current rule by defaultv2.5.0+- { value:1, prepend:'goods_name', child: true }
notice
- handlepriority is greater than- value
- All eligible 'controls' will take effect. Before v2.5, only the first one will take effect
# handleExample
 Enter the reason for the bad review when the review is less than 3 stars
# apppend example v2.5.0+
 Insert text 4 when input3 enters the value
# childExamplev2.5.0+
 Append slot when typing append
# Combination examplev2.5.0+
Multiple control take effect simultaneously
