javascript - Sharing script between different switch case condition -

condition 1 should perform task 1, 2, 3, 4, 5, , 9. condition 2 should perform task 1, 2, 3, 6, 7, , 9. condition 3 should perform task 8 , 9.

the following easy read, not work second condition1 , condition2 tasks not executed earlier break causes script exit switch statement.

var condition='condition1';  switch(condition) {     case 'condition1':     case 'condition2':         console.log('do task 1');         console.log('do task 2');         console.log('do task 3');         break;     case 'condition1':         console.log('do task 4');         console.log('do task 5');         break;     case 'condition2':         console.log('do task 6');         console.log('do task 7');         break;     case 'condition3':         console.log('do task 8');         break; } console.log('do task 9'); 

the following should work, not easy read, , become increasingly more difficult more functionality shared between different conditions.

var condition='condition1';  switch(condition) {     case 'condition1':     case 'condition2':         console.log('do task 1');         console.log('do task 2');         console.log('do task 3');         switch(condition) {             case 'condition1':                 console.log('do task 4');                 console.log('do task 5');                 break;             case 'condition2':                 console.log('do task 6');                 console.log('do task 7');                 break;         }         break;     case 'condition3':         console.log('do task 8');         break; } console.log('do task 9'); 

again, should work, coming descriptive names different groups problematic.

var condition='condition1';  switch(condition) {     case 'condition1':         task_group_1_2_3();         task_group_4_5();         break;     case 'condition2':         task_group_1_2_3();         task_group_6_7();         break;     case 'condition3':         console.log('do task 8');         break; } console.log('do task 9');  function task_group_1_2_3() {     console.log('do task 1');     console.log('do task 2');     console.log('do task 3');     }  function task_group_4_5() {     console.log('do task 4');     console.log('do task 5'); }  function task_group_6_7() {     console.log('do task 6');     console.log('do task 7'); } 

what cleanest way create switch statement shares script between different case conditions?

you move conditions object , tasks , iterate array task.

you use right name instead of number key name.

var tasks = {          1: function () { console.log(1); },          2: function () { console.log(2); },          3: function () { console.log(3); },          4: function () { console.log(4); },          5: function () { console.log(5); },          6: function () { console.log(6); },          7: function () { console.log(7); },          8: function () { console.log(8); },          9: function () { console.log(9); }      },      conditions = {          1: [1, 2, 3, 4, 5, 9],          2: [1, 2, 3, 6, 7, 9],          3: [8, 9]      },      condition = 1;    conditions[condition].foreach(function (a) { tasks[a](); });

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