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blockly > IConnectionChecker > canConnect
IConnectionChecker.canConnect() method
Check whether the current connection can connect with the target connection.
Signature:
canConnect(a: Connection | null, b: Connection | null, isDragging: boolean, opt_distance?: number): boolean;
Parameters
| Parameter |
Type |
Description |
| a |
Connection | null |
Connection to check compatibility with. |
| b |
Connection | null |
Connection to check compatibility with. |
| isDragging |
boolean |
True if the connection is being made by dragging a block. |
| opt_distance |
number |
(Optional) The max allowable distance between the connections for drag checks. |
Returns:
boolean
Whether the connection is legal.
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Last updated 2024-09-18 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-18 UTC."],[[["\u003cp\u003e\u003ccode\u003eIConnectionChecker.canConnect()\u003c/code\u003e determines if two connections, represented by \u003ccode\u003ea\u003c/code\u003e and \u003ccode\u003eb\u003c/code\u003e, can be connected.\u003c/p\u003e\n"],["\u003cp\u003eThis method considers the connections themselves, whether a block is being dragged (\u003ccode\u003eisDragging\u003c/code\u003e), and optionally a maximum allowed distance (\u003ccode\u003eopt_distance\u003c/code\u003e).\u003c/p\u003e\n"],["\u003cp\u003eIt returns \u003ccode\u003etrue\u003c/code\u003e if the connection is permitted and \u003ccode\u003efalse\u003c/code\u003e otherwise.\u003c/p\u003e\n"]]],[],null,["[blockly](./blockly.md) \\\u003e [IConnectionChecker](./blockly.iconnectionchecker_interface.md) \\\u003e [canConnect](./blockly.iconnectionchecker_interface.canconnect_1_methodsignature.md)\n\nIConnectionChecker.canConnect() method\n\nCheck whether the current connection can connect with the target connection.\n\n**Signature:** \n\n canConnect(a: Connection | null, b: Connection | null, isDragging: boolean, opt_distance?: number): boolean;\n\nParameters\n\n| Parameter | Type | Description |\n|--------------|-----------------------------------------------------|----------------------------------------------------------------------------------|\n| a | [Connection](./blockly.connection_class.md) \\| null | Connection to check compatibility with. |\n| b | [Connection](./blockly.connection_class.md) \\| null | Connection to check compatibility with. |\n| isDragging | boolean | True if the connection is being made by dragging a block. |\n| opt_distance | number | *(Optional)* The max allowable distance between the connections for drag checks. |\n\n**Returns:**\n\nboolean\n\nWhether the connection is legal."]]
