addIndex first commit

.gitignore

@@ -5,3 +5,4 @@ custom
 *.log
 
 .versions
+.idea

src/components/core/manipulation/addSlide.js

@@ -0,0 +1,47 @@
+import Support from '../../../utils/support';
+
+export default function (index, slides) {
+  const swiper = this;
+  const { $wrapperEl, params, activeIndex } = swiper;
+  if (params.loop) {
+    swiper.loopDestroy();
+    swiper.slides = $wrapperEl.children(`.${params.slideClass}`);
+  }
+  const baseLength = swiper.slides.length;
+  if (index <= 0) {
+    swiper.prependSlide(slides);
+    return;
+  } else if (index >= baseLength) {
+    swiper.appendSlide(slides);
+    return;
+  }
+  let newActiveIndex = activeIndex > index ? activeIndex + 1 : activeIndex;
+
+  const slidesBuffer = [];
+  for (let i = baseLength - 1; i >= index; i -= 1) {
+    const currentSlide = swiper.slides.eq(i);
+    currentSlide.remove();
+    slidesBuffer.unshift(currentSlide);
+  }
+
+  if (typeof slides === 'object' && 'length' in slides) {
+    for (let i = 0; i < slides.length; i += 1) {
+      if (slides[i]) $wrapperEl.append(slides[i]);
+    }
+    newActiveIndex = activeIndex > index ? activeIndex + slides.length : activeIndex;
+  } else {
+    $wrapperEl.append(slides);
+  }
+
+  for (let i = 0; i < slidesBuffer.length; i += 1) {
+    $wrapperEl.append(slidesBuffer[i]);
+  }
+
+  if (params.loop) {
+    swiper.loopCreate();
+  }
+  if (!(params.observer && Support.observer)) {
+    swiper.update();
+  }
+  swiper.slideTo(newActiveIndex, 0, false);
+}

src/components/core/manipulation/index.js

@@ -1,11 +1,13 @@
 import appendSlide from './appendSlide';
 import prependSlide from './prependSlide';
+import addSlide from './addSlide';
 import removeSlide from './removeSlide';
 import removeAllSlides from './removeAllSlides';
 
 export default {
   appendSlide,
   prependSlide,
+  addSlide,
   removeSlide,
   removeAllSlides,
 };