Added resetOnOptionsChange parameter to allow changing the options of the select without resetting the value. This is extra useful for ajax request, especially slow ajax requests

src/components/Select.vue

@@ -383,7 +383,16 @@
 					}
 					return newOption
 				}
-			}
+			},
+
+			/**
+			 * When false, updating the options will not reset the select value
+			 * @type {Boolean}
+			 */
+			resetOnOptionsChange: {
+				type: Boolean,
+				default: true
+			},
 		},
 
 		data() {
@@ -402,7 +411,7 @@
 				}
 			},
 			options() {
-				if (!this.taggable) {
+				if (!this.taggable && this.resetOnOptionsChange) {
 					this.$set('value', this.multiple ? [] : null)
 				}
 			},

test/unit/coverage/lcov-report/base.css

@@ -166,10 +166,13 @@ table.coverage td span.cline-any {
 /* dark green */
 .status-line.high, .high .cover-fill { background:rgb(77,146,33) }
 .high .chart { border:1px solid rgb(77,146,33) }
-
-
-.medium .chart { border:1px solid #666; }
-.medium .cover-fill { background: #666; }
+/* dark yellow (gold) */
+.medium .chart { border:1px solid #f9cd0b; }
+.status-line.medium, .medium .cover-fill { background: #f9cd0b; }
+/* light yellow */
+.medium { background: #fff4c2; }
+/* light gray */
+span.cline-neutral { background: #eaeaea; }
 
 .cbranch-no { background:  yellow !important; color: #111; }
 
@@ -177,8 +180,6 @@ table.coverage td span.cline-any {
 .fstat-skip { background: #ddd; color: #111 !important; }
 .cbranch-skip { background: #ddd !important; color: #111; }
 
-span.cline-neutral { background: #eaeaea; }
-.medium { background: #eaeaea; }
 
 .cover-fill, .cover-empty {
   display:inline-block;

test/unit/specs/Select.spec.js

@@ -752,6 +752,21 @@ describe('Select.vue', () => {
 				})
 			})
 		})
+		it('should not reset the selected value when the options property changes', (done) => {
+			const vm = new Vue({
+				template: '<div><v-select :options="options" :value.sync="value" :multiple="true" taggable></v-select></div>',
+				components: {vSelect},
+				data: {
+					value: [{label: 'one'}],
+					options: [{label: 'one'}]
+				}
+			}).$mount()
+			vm.$children[0].options = [{label: 'two'}]
+			Vue.nextTick(() => {
+				expect(vm.$children[0].value).toEqual([{label: 'one'}])
+				done()
+			})
+		})
 	})
 
 	describe('Asynchronous Loading', () => {
@@ -839,4 +854,38 @@ describe('Select.vue', () => {
 			})
 		})
 	})
+
+	describe('Reset on options change', () => {
+		it('should not reset the selected value when the options property changes', (done) => {
+			const vm = new Vue({
+				template: '<div><v-select :options="options" :value.sync="value" :reset-on-options-change="false"></v-select></div>',
+				components: {vSelect},
+				data: {
+					value: 'one',
+					options: ['one', 'two', 'three']
+				}
+			}).$mount()
+			vm.$children[0].options = ['four', 'five', 'six']
+			Vue.nextTick(() => {
+				expect(vm.$children[0].value).toEqual('one')
+				done()
+			})
+		})
+
+		it('should reset the selected value when the options property changes', (done) => {
+			const vm = new Vue({
+				template: '<div><v-select :options="options" :value.sync="value"></v-select></div>',
+				components: {vSelect},
+				data: {
+					value: 'one',
+					options: ['one', 'two', 'three']
+				}
+			}).$mount()
+			vm.$children[0].options = ['four', 'five', 'six']
+			Vue.nextTick(() => {
+				expect(vm.$children[0].value).toEqual(null)
+				done()
+			})
+		})
+	})
 })