Update Checklist Item with task.checklistitem.update

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASKID":13,"ITEMID":475,"FIELDS":{"TITLE":"Prepare report","PARENT_ID":447,"SORT_INDEX":100,"IS_COMPLETE":"N","IS_IMPORTANT":"N","MEMBERS":{"547":{"TYPE":"A"},"125":{"TYPE":"U"}}},"auth":"**put_access_token_here**"}' \
        https://**put_your_bitrix24_address**/rest/task.checklistitem.update
        

// This snippet is an ES module: top-level await requires type="module" or a bundler.
        // $b24 is an already-initialized SDK instance (see the SDK "Get started" guide).
        import { Text } from '@bitrix24/b24jssdk'
        import type { B24Frame } from '@bitrix24/b24jssdk'
        
        declare const $b24: B24Frame
        
        // Shape of the payload returned in result (match the "response handling" section of the page)
        type ChecklistItemUpdateResult = null
        
        try {
          const response = await $b24.actions.v2.call.make<ChecklistItemUpdateResult>({
            method: 'task.checklistitem.update',
            params: {
              TASKID: 13,
              ITEMID: 475,
              FIELDS: {
                TITLE: 'Prepare report',
                PARENT_ID: 447,
                SORT_INDEX: 100,
                IS_COMPLETE: 'N',
                IS_IMPORTANT: 'N',
                MEMBERS: {
                  547: { TYPE: 'A' },
                  125: { TYPE: 'U' },
                },
              },
            },
            requestId: Text.getUuidRfc4122()
          })
        
          // The payload is available only on a successful response
          if (!response.isSuccess) {
            console.error(response.getErrorMessages().join('; '))
          } else {
            const result = response.getData()!.result
            console.info('Checklist item updated successfully, result:', result)
          }
        } catch (error) {
          // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
          console.error(error)
        }
        

<!-- Load the SDK (UMD build); it is exposed as the global B24Js -->
        <script src="https://unpkg.com/@bitrix24/b24jssdk@1/dist/umd/index.min.js"></script>
        <script>
          async function updateChecklistItem() {
            try {
              // Initialize the SDK inside a Bitrix24 frame
              const $b24 = await B24Js.initializeB24Frame()
        
              const response = await $b24.actions.v2.call.make({
                method: 'task.checklistitem.update',
                params: {
                  TASKID: 13,
                  ITEMID: 475,
                  FIELDS: {
                    TITLE: 'Prepare report',
                    PARENT_ID: 447,
                    SORT_INDEX: 100,
                    IS_COMPLETE: 'N',
                    IS_IMPORTANT: 'N',
                    MEMBERS: {
                      547: { TYPE: 'A' },
                      125: { TYPE: 'U' },
                    },
                  },
                },
                requestId: B24Js.Text.getUuidRfc4122()
              })
        
              // The payload is available only on a successful response
              if (!response.isSuccess) {
                console.error(response.getErrorMessages().join('; '))
                return
              }
        
              const result = response.getData().result
              console.info('Checklist item updated successfully, result:', result)
            } catch (error) {
              // Thrown on transport or SDK failures (AjaxError, SdkError, etc.)
              console.error(error)
            }
          }
        
          document.addEventListener('DOMContentLoaded', updateChecklistItem)
        </script>
        

from b24pysdk.errors import BitrixAPIError, BitrixSDKException
        
        fields = {
            "TITLE": "Prepare the report",
            "PARENT_ID": 447,
            "SORT_INDEX": 100,
            "IS_COMPLETE": "N",
            "IS_IMPORTANT": "N",
            "MEMBERS": {
                "547": {
                    "TYPE": "A",
                },
                "125": {
                    "TYPE": "U",
                },
            },
        }
        
        try:
            bitrix_response = client.task.checklistitem.update(
                task_id=13,
                item_id=475,
                fields=fields,
            ).response
            result = bitrix_response.result
            print(result)
        except BitrixAPIError as error:
            print(
                "Bitrix API error",
                f"error: {error.error}",
                f"error_description: {error.error_description}",
                sep="\n",
            )
        except BitrixSDKException as error:
            print(f"Bitrix SDK error: {error.message}")
        except Exception as error:
            print(f"Unexpected error: {error}")
        

try {
            $response = $b24Service
                ->core
                ->call(
                    'task.checklistitem.update',
                    [
                        'TASKID' => 13,
                        'ITEMID' => 475,
                        'FIELDS' => [
                            'TITLE' => 'Prepare report',
                            'PARENT_ID' => 447,
                            'SORT_INDEX' => 100,
                            'IS_COMPLETE' => 'N',
                            'IS_IMPORTANT' => 'N',
                            'MEMBERS' => [
                                547 => [
                                    'TYPE' => 'A'
                                ],
                                125 => [
                                    'TYPE' => 'U'
                                ]
                            ]
                        ]
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            echo 'Success: ' . print_r($result, true);
            processData($result);
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error updating checklist item: ' . $e->getMessage();
        }
        

BX24.callMethod(
            'task.checklistitem.update',
            {
                'TASKID': 13,
                'ITEMID': 475,
                'FIELDS': {
                    'TITLE': 'Prepare report',
                    'PARENT_ID': 447,
                    'SORT_INDEX': 100,
                    'IS_COMPLETE': 'N',
                    'IS_IMPORTANT': 'N',
                    'MEMBERS': {
                        547: {
                            'TYPE': 'A'
                        },
                        125: {
                            'TYPE': 'U'
                        }
                    }
                }
            },
            function(result){
                console.info(result.data());
                console.log(result);
            }
        );
        

require_once('crest.php');
        
        $result = CRest::call(
            'task.checklistitem.update',
            [
                'TASKID' => 13,
                'ITEMID' => 475,
                'FIELDS' => [
                    'TITLE' => 'Prepare report',
                    'PARENT_ID' => 447,
                    'SORT_INDEX' => 100,
                    'IS_COMPLETE' => 'N',
                    'IS_IMPORTANT' => 'N',
                    'MEMBERS' => [
                        547 => [
                            'TYPE' => 'A'
                        ],
                        125 => [
                            'TYPE' => 'U'
                        ]
                    ]
                ]
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';
        

// client and ctx are already created — see the Go SDK section
        res, err := client.Core().Call(ctx, "task.checklistitem.update", b24.Params{
        	"TASKID": 13,
        	"ITEMID": 475,
        	"FIELDS": b24.Params{
        		"TITLE":        "Prepare report",
        		"PARENT_ID":    447,
        		"SORT_INDEX":   100,
        		"IS_COMPLETE":  "N",
        		"IS_IMPORTANT": "N",
        		"MEMBERS": b24.Params{
        			"547": b24.Params{
        				"TYPE": "A",
        			},
        			"125": b24.Params{
        				"TYPE": "U",
        			},
        		},
        	},
        })
        if err != nil {
        	return fmt.Errorf("task.checklistitem.update: %w", err)
        }
        
        // The response arrives as json.RawMessage — unmarshal it
        // into a struct matching the response shape shown below on this page.
        fmt.Printf("%s\n", res.Result)